ESTATE SALE Cadillac EFI V8-6-4 | Will it RUN AND DRIVE 500 miles after 12 years?

[@wesleydolen9180]

I worked for Cadillac as a district service manager when that car was introduced. In pre-release service meetings, it was well-known from the very beginning, that the 8/6/4 was planned to be a one-year-only engine. The big problem was the early Delco electronics. The MAP sensor was calibrated with too-close tolerances. If the engine hic-upped (backfired) it would shut down. There was no repair except to replace the MAP sensor. The bigger problem was replacement stock was the exact same part, and it took GM a while before an updated unit could be supplied. Dealers would disconnect the 8/6/4 feature, running it as an 8cyl only. The press had a field day. I inspected a limo in West Palm Beach, Florida, that the owner wanted all the interior chrome replaced. Someone had discharged a tear gas device inside the car that caused the damage ( the interior chrome pieces came from different suppliers, so it was impossible for all of it to be defective) and I denied the claim. It turned out the limo was owned by the owner of the newspaper 'The National Inquirer" (famous for stories like 'I got pregnant by an alien, etc.) They went on a HUGE hate campaign, smearing the vehicle, which only threw fuel on the fire. Those were tough times to be a Cadillac District Service manager.

[@Axetele]

Very cool information. Thanks!

[@arthicks2566]

I've heard that the fix was disable or remove the 4/6/8 function and just run on all 8.

[@ruadrift]

"fuel on the fire" LOL

[@vincedibona4687]

Cool story bro. Needs more dragons.

[@ExRev79]

What a great story for the history books. its little things like this that we miss hearing in the press.

[@reavisstockard2994]

As a 35 year mechanic I want to say that I admire Derek for messing with that aggravating thing. RESPECT!

[@rafaelramirez4371]

Nice car tow her back home and do a carburetor swap and a computer delete and you will have a nice looking Cadillac 👍 😉 👌

[@GibClark]

👍🏻👍🏻👍🏻👍🏻👍🏻Carb swap

[@pclayton5063]

I think I would have pushed it outside a set it afire.

[@highnoter1]

LOL It was on fire🤣

[@edwardjbarton]

LS swap

[@artistnyc123]

"The brake drum has traveled farther than the vehicle itself" man that was classic.

[@ji8044]

This was one of the best episodes ever, even though it ended in ultimate failure.

[@loviedebiasio8864]

I LMFAO when I saw that drum doing a burn out almost made it out the door

[@Martin4982]

I laughed so much after that, had to rewind 60 sec back of the video that I missed after that...

[@jessesager9460]

I also laughed stupid hard at the brake drum part 😂

[@stephen2028]

And it looked to me like it went right through the camera tripod. Laughed so hard when he said the drum travelled farther than the car.

[@cleetussnow7159]

Do not quit on this. Never ever let the machines win! You let one win the others will walk all over you. This was a great great video and bring on Pt. II please!

[@briancollier6887]

This episode should be called Man versus machine. It's so fun to watch these videos of Derek doing Derek things. Hats off to O'Reilly's for supporting the man.

[@phillipkelley3513]

I love his videos and definitely wish that he would wear PPE in all of his videos for his safety and the viewers if they work on their personal cars..

[@loganmansfield7204]

😊

[@jaredreid2661]

And the perfect setup/medium. Access to parts and tools in a long format to watch him really go through everything. it was awesome!

[@michaelb.42112]

Derek is the man and the machine LOL.

[@fgb3126]

Oh is that right? O'Reilly's has a business relationship with VGG? That would make sense.

[@tyharrell1658]

I think this is the first time that we have actually seen you really struggle with a rig. This is sooooooooo relatable - if you have spent any time under a hood, you have been here. Thank you so much for showing that you struggle at times. So much of what you do, you make look so easy and it is so cool to see that the master struggles at times too - but you never give up and you are an inspiration to so many.

[@hughbo52]

Nice reply sir.

[@johnramsey2009]

I agree. I loved this episode. But I wanted him to get it so badly!.

[@mrwebber35]

With every new advance on engine control the mechanics scream to the high heavens only they can work on such things. Then it leaks out people can do the stuff at home. This one off Caddy must have been difficult to understand in the days of stone knives and bear skins. No OBD1 port, just skill and understanding but without experience and probably no GM training centre on the thing cutting off wires would seem like common place with lots of name calling and colourful adjectives. Just cutting off stuff because it should work without any professional training sounds crazy but in 1982 I bet frustrations grew. I bet a full diagnostic modern shop could make this work great today. Might take some serious time and serious money for parts but it would be child's play for todays modern journeyman.

[@johnramsey2009]

@@mrwebber35 I don't know.... I view the 1980's and early 90's cars as the most complex of any car to work on. It's a hodgepodge of mechanical band-aids and analog electronics. Older cars were purely mechanical and simple. Newer cars have more reliable electronics with a usable interface where you can kind of get a handle of what what is happening. You can just look under the hoods and see that reflected too. 1960's cars clean and understandable. 1980's cars, "I've never seen so many hoses and belts and pulley's." 2010's cars just the alternator off a pulley. Now I haven't worked on a car from the 2020's. It remains to be seen whether these next levels of tech with self-driving, and more computerization will render cars economically unrepairable down the road.

[@mrwebber35]

​@@johnramsey2009 Before I bought a new Chev in 2015 I thought the motorized digital steering wheel on all newer vehicles would fail by suddenly turning on it's own or even refuse to turn. Of course I bought one anyways and have never heard of a recall on such a device. Lane correction tech and self drive needs this. I am by no ways up on all the recalls but if this ever became a serious problem it would be wide spread news you would think. What really bothers me about American rules when it comes to flood damage write-off vehicles is there are repair guys that can buy these water soaked vehicles and put them back on the road. I live in Canada and they have a rule that no flood damaged car can be repaired ever. That other channel that I follow 'Tavarish' with his flooded McLaren is proof the States allow for restorations. I watch every episode and I know Tavarish is inspecting every electrical connection and tearing it right down to inspect every sand and salt damaged area. I think he is doing a great job but not every shade tree shop can be trusted when it comes to life and safety. Even Counting Cars cut out the middle of a heavy chrome front bumper so his rest-o-mod would look cool. It would kill the driver if he hit a big tree head on but according to American laws that is a road worthy car in Vegas it seems. Even some motor homes are not legal in Canada that are made in the States. Bottom line, if anyone gets killed by failed damaged write-off safety equipment the guy responsible for installing it or claiming is is safe should be charged with second degree murder of something. Imagine driving down the the #1 Pacific Coast highway at 70-80 mph and forced to fly off a cliff into the ocean. I'm sorry, this bothers me. Even watching Derek tear into some 30-40 year old drum brakes without an asbestos 1/2 mask bothers me. I was working on those brakes in 1989. The boss wanted me to blow them out with compressed air and open up the big garage door. I would hold my breath then stand outside watching what looked like a storm cloud blanket the entire staff's parking lot. I was working for the Provincial gov't a the time and I had to petition the management for an asbestos mask. The boss never used them before, imagine that? He said to me, "If you can't stand a little dust boy, you are in the wrong business". Stuff like that bothers me now more than it should I suppose. Old School ways are dangerous when applied to new world tech sometimes. People sometimes are afraid of change.

[@ShanesGettingHandy]

I clicked this as fast as I could, VGG is definitely my favorite thing on KZbin.

[@jerrywilcox9890]

And

[@johndicarlo225]

And 😂 We love Derek and Jessica I think he means

[@txretrogaming]

Me too

[@jerrywilcox9890]

@@johndicarlo225 not what I mean.

[@joeperkins4309]

​@@jerrywilcox9890not everyone that took mind reading 101 passed that class 🤷‍♂️

[@ToyodaMaster-tq6ht]

Derek, can’t stress enough the importance of SAFETY GLASSES. I’ve had the unfortunate experience of getting shards of metal stuck into my Cornea. Definitely not an enjoyable experience. Eye Doc was able to pluck the bits out. But this experience taught me a valuable lesson. You only get one set of Eyes. Protect them from damage!

[@dooby1445]

Same with ears and hearing!!! I’ve heard too many old guys beg young guys to wear hearing protection so they don’t end up like them. I’m a young guy with great hearing and I can’t comprehend Derek managing to use that angle grinder on that exhaust without his ears physically hurting.

[@joetart9905]

As an eye doctor, I concur 😊

[@Mr6384]

Yes please

[@LesCunliffe]

I did hear him say he had on safety-squints. Not sure of their protection rating though. 😅

[@Dek11k]

Also your lungs,when doing that with an exhaust,you should wear a mask. Considering the US didn't start to ban asbestos until 2016 ( Industries still using white asbestos will have up to 12 years to phase it out of use).makes it more so. We(UK)banned it back in 1999.

[@Slider68]

I owned a 1981 Seville with the V8-6-4. Pressing and holding hotter and colder hvac buttons gets you into the efi diagnostic system. In there you can check the injector pulse width, as well as adjust the fuel mixture. Get yourself a shop manual from somewhere and get the TBI working properly. Those systems can be quite reliable. As far as the V8-6-4 system, with it disabled it got 14 mpg on the highway. Enabled, and on 4-cylinders, it got 24 mpg. Other than being truly gutless on 4 cylinders and surging between 4 and 8 on hilly terrain, the system always worked flawlessly. I put over 200,000 trouble free miles on it before selling it to a guy who put another 150,000 on it. I recommend leaving it stock and leaving the V8-6-4 enabled. I did rig up a switch on the dash to disable it for when driving on hilly terrain, but rarely disabled it.

[@Slider68]

I just remembered that when I first bought the Seville that it also used to flood slightly when first started. Mine needed a new engine temperature sensor. That was the one and only issue, other than brake and fluid changes that it had.

[@Bloodcurling]

Great comment

[@bbarmourer2972]

This man is just an absolute frontline stand up and be counted fella. He has been weighed, measured and NEVER found wanting in bringing us the very best of content. How he never loses it I'll never know, (on camera, at least). Not even a swear word!!!!! I would have been bleep bleep and throwing me tools like a banshee. Hats off to THE MAN. The brake drum was a killer moment. Anyone notice that even though it stopped travelling, under the bench, it was still spinning on the spot? Awesome.

[@dwitcraft]

The brake drum completely made the video! I laughed so hard I almost hurt myself!

[@DJRoyalEdo]

Who gives a flying fuck about a swear word? He is making more money than you can dream of, why would he be upset? Lol

Now I have to rewatch the brake drum, I missed some of it laughing!

[@j2kinflarc768]

Yes! I was wondering if we were getting a video. Better late than never. Hated that motor. I was driving a tow truck back in the 90’s. I showed up at the Boston tow yard to tow one. Older guy was picking it up after it broke down and it was towed by the city. It wasn’t until we were heading to his house that he confessed that he couldn’t pay me, spent all his money on fee’s. So I swung by my buddies shop and we basically disconnected stuff and got it running again. Don’t remember what we did, but the old fella was thrilled, thanked us with tears in his eyes and drove off with a smile.

[@MrDoyle07]

That was a beautiful story. You made the world a little bit better. Hat Tip, to you and your friend in the garage. 🙏🏻

[@PaulJFleischer]

You are something, Derek. My Dad had a V8-6-4. He had a four door medium grey and it was nice and comfortable but he complained that the engine was flaky. Was his last car and he still liked it.

[@williamsadler9119]

I have owned a couple of these. A simple intercept of the high gear signal wire from the driver side of the transmission will bypass the 8-6-4 system. There is also a single pole plug under the hood to bypass the digital computer for analog. Hold the "OFF" and "Warmer" buttons on the AC control for a few seconds to enter the built-in diagnostics. It will allow you to see all sensor values and even cycle all solenoids... enjoy!

[@gsommerfeldt]

Someone didn’t watch the whole video before commenting… ;)

[@calculator5193]

@@gsommerfeldt is that a prerequisite to commenting now? are you the comment police are you going to be enforcing this from now on?

[@gsommerfeldt]

@@calculator5193It’s a prerequisite for not looking a bit silly, babe.

[@MrImprobablyright]

​​@@calculator5193Yes, f*** you. Capitalize your sentences too damnit.

[@somethingtrulyhorrifying]

As far as intercepting the high gear signal wire I think that's the wire he was talking about at 2:05:31 but I didn't hear him mention the plug for analog bypass.

[@MattBrownbill]

I took apart a TBI unit, and on trying to start it flooded the engine with fuel. The engine hydro-locked, so I took out the plugs and turned over the engine. The ejected petrol was ignited by a stray HT lead and the whole engine bay went up in a large fireball. My kids asked me to do it again as they didn't all see it... Ahem. 😮

[@lilhuggie6561]

At my high school shop class we have a 1990 Chevy 3500 that has a tbi 454 big block in it and that mf blows your eardrums whenever it backfires and also throws huge flames within 5 feet of the motor. It’s sum bout them tbi’s😂😂

[@glockadelic4110]

As someone who loves your channel and thinks the world of you, it was painful to see you struggle so. I also admire your commitment and have the utmost respect for how hard you worked on this episode. Thanks for all you do and the sacrifices you and your family make to keep this channel the best on you tube.

[@mg8919]

Well said! This guy is someone we all could learn a thing or 3 from.

[@Adz32]

This is the first Vice Grip Garage segment I have ever seen, and it was amazing! You are a true comedian and doing exactly what you should be doing in this world. I feel for the struggle man but your composure was seriously admirable. I recently bought a 1981 Cadillac DeVille Sedan here in Australia that once belonged to my grandfather. It was the last car my grandfather owned, and he used to pick me up from school in it when I was 6. After he passed, the family sold it, and I saw it parked outside a restaurant. I went in and asked for the owner of the car. The owner and I had a great chat, and he confirmed it was my grandfather's and that he would call me if he was ever going to sell it. 12 years later, I got the call, and I bought it. When I went to pick it up and drive it home, it was the first time I had sat in the car for 34 years, and it had barely changed. Now I am slowly restoring the car. I would love to see if you can revive this thing. All the best, and thanks so much for the laughs.

[@jimmehp2748]

Cool story about your Grandfathers car! Good luck with it. I have been Derek and this channel all through covid, we have it on the the living room most Friday evenings, and it amazes me we can watch for hours.

[@mattrevan9524]

Beautiful story and congrats on finding a piece of your family's history! My parents had a baby blue Coupe DeVille with a white top, same body style as Derek's but I think it was a 82 or 83, for a few years back in the 80s and I have a big nostalgic soft spot for these style cars. Good luck with the restoration!

[@leebarker539]

In no way am I, the viewer, disappointed that the CattleRack did not make the cross-country equivalent of the Brickyard 500. The real benefit here is being inside Derek's marvelous mind as he observes, processes, analyzes, tries something, then repeats; perseveres past most folks' finish line. It's a lesson as large as life and it just happens to be delivered in the presence of an automobile.

[@bobbymckenzie3202]

Crapillac😂

[@shakyjake2133]

This is such a perfectly apt comment. This can be applied to many portions of life. I've introduced several viewers to this channel who are not into automobiles but he has such a great outlook that they just dive into a rabbit hole. It's wonderful.

[@LisaMedeiros-tr2lz]

He absolutely had to invent some new creative cusswords off camera, but yeah. Most people would have given up way before he did. Hence "ran when parked". His no-nonsense analytical approach to problem solving is applicable to many things in life. Complex problems only rarely lend themselves to easy solutions.

[@ScottGovey]

Great attempt! Been working on cars for over 30yrs Rule #1 for any obd1 system when it dumps fuel, unplug the coolant temp sensor for the computer. When they fail, they tell the computer its -39 degrees therefore it dumps the whole fuel tank down it. Then go from there. Would like to see an update on this. Thanks for sharing with us! P.S. I still have that rear bumper for independence to give to you if you want it.😂 Keep them videos coming but don't over work yourself buddy.

[@LynxStarAuto]

TBI's are speed density, so the MAP sensor signal is absolutely vital, as it provides the engine load reading to the computer. Temp sensor and MAP sensor are vital.

[@roberthaney3089]

Yes. Map and coolant. Definitely would have jumped the obd. And pulled codes. The other known issue is the grounds to the pcm and corrosion on the ignition switch on the column. It sucks we can't message him while he's tinkering.

[@nsxmatt]

It's not even OBD1 it's just OBD. OBD1 systems used 4 wire o2's and an OBD port. These were very basic obd systems with no port and usually 1 wire o2's.

[@ScottGovey]

@@nsxmatt yes that is correct, even though its not technically correct that we always called it obd1 lol.

[@mindblownwatcher8536]

@@nsxmatt Yup , before OBD , GM had CCC ( computer command control) .

[@kenfromsilverdale5675]

A bad Coolant temperature sensor will cause all the problems you're experiencing if it's feeding the ECM a -39 degree value. Very common problem in that era.

[@mrwebber35]

I'm #60 like... Makes sense. I have to adjust my choke on my 1976 Dodge when winter hits in just such a way so it won't stall and manually feather the butterfly valve. I am still trying to come up with a way to have this automated without switching to fuel injection. I should point out there are no vacuum leaks and the carb is rebuilt, clean and operating properly. I claim innocence since it is well documented the Dodge B200 vans were notorious for having terrible chokes hard to set and weather playing a big role in how they caused problems. As proof there is a KZbin video about the movie Cannon Ball Run where the Burt Remolds B200 ambulance would stall after driving 100 yards chugging and too much butterfly valve. I pretty much have it working now without stalling.

[@skip-a-doo]

had to leave a 1993 chevy van in washington DC,on a sunday, dumping fuel, changed the injectors in parking lot,tried everything, had a day like Dereks with my wife and daughter watching. rented a car,came home and got more tools and a sensor tester,drove back down, found out where the van was towed to for being in a parking lot and sure enough,computer was being fed a minus 30 or so temp so sent full choke. flooding the engine, changed sensor, got the fuel cleaned out and drove it home

[@jeffrobodine8579]

​@@mrwebber35Can't you just put a manual choke in it with the old pull knob under the dash?

[@davidcolantuoni9165]

Had the bad computer temp sensor tell the engine it was -30 degrees

[@jimsoldschoolshop6767]

I had a similar (over fueling) situation with Dual TPI on 1984 Corvette. Problem was the front temp sender that feeds back to computer. The computer must read ground and hot lead from this sender. Corvette gods sent me a sender with one lead and told me to ground the other to the engine. I had to get a new sender with both leads and hook up directly to the leads. Throttle body injectors are touchy and the computer needs to read directly from the temp sensors. Replace front temp sensor, check ground going directly to computer….. you might be surprised…..1984 Vettes have a bad rap because of dual Crossfire design and this ground issue. Idle is another subject, not enough space to put in the text. I enjoyed the video

[@Bishopspipes]

I took a shot for every time you tried starting the engine. My liver has dissolved. Thank you

[@eagleeyepierce5549]

😅😅😅😅😅😅😅😅😅😅😅😅😂😂😂😂😂😂

[@Alucard0rJo3kr]

I know a lot of the folks here might disagree but i think a deep drive into this system and how it works would be an absolutely fascinating long form video. Obviously when its back at Rusty Acres of course. That would definitely be a treat from an educational and entertainment stance. They only made it one year and I think just getting into the weeds on it would absolutely kick ass.

[@tjnucnuc]

There’s already long form explanations of it. It’s really not that complicated.

[@klauswassermann8054]

The Cadillac of despair. What a test of wits and perseverance. I felt for you through all of it while still bursting into laughter a number of times. What an extraordinary episode, thanks Derek for actually putting this one out :)

[@LynxStarAuto]

I lost my shit when the drum flew off. Especially since it dodged the tripod scurried right between the legs before hitting the work bench 😂😂😂

[@Gkitchens1]

Man I’m telling you I was actually gritting my teeth while he was trying to get the exhaust ripped out. I miss being able to do this stuff :(

[@gordeymixer5494]

😂😂😂😂the exhaust and the drum flying off.. this episode is my personal favorite now 😂😂

[@CARSON441]

Wwskd? What would Scotty Kilmer do?

[@soundman460]

I don’t think I have laughed so hard at an episode as this one. You were in rare form. Love it. Thanks for all the hard work to make these videos for us

[@soundman460]

Watched the second half and bless you man. I would have figured out how to drip feed that intake with a valve in the cab.

[@danw5414]

Talk about cracking up. That episode of the Corvair when he opened the door and his kid looked in there. Whatever Derek said and way the kid looked at the rot, it was just hysterical.

[@jesperlehmann4336]

The exhaust part was epic 😂

[@josephdesilva9400]

Yeah, I must say this one was different. Definitely got me laughing when that drum went shooting across the shop I could see his frustration but he definitely knows how to keep his cool with comedy lol

[@louchieandiani1992]

Derek's demeanor is excellent 👌🏻 He never calls things out as garbage, piece of junk, should have never been made. He stays calm, steps back, analyzes and tries again. I know deep down he's a Chevy guy, but he doesn't brand name bash. That takes a lot. Most guys are narrow minded and can't do that.

[@Manholmes]

Having a cameraman is a big plus. Being able to catch that brake drum take off and catch Derek's live expression in the shot was absolute gold.

[@twiggss4344]

I assume the camera shot being shakey was the cameraman trying to contain his laughter.

[@mtnmanjake]

I know I'm getting old because the constant moving panning zooming camera just made me motion sick

[@AkioWasRight]

I actually prefer no cameraman. It feels more homely and unrehearsed.

[@muffntheB]

thats not a cameraman, thats a shaky dude derick asked to hold the camera big difference, and it changes the whole show for the worse

[@big_red_machine3547]

Cameraman was good with that yes, but should zoom in more when Derek is showing the injectors and stuff like that

[@martinpedersen4886]

Great episode, but would really like it to have a part two being done after some research maybe, to make it a success. Thank you O'reilly for making that episode possible, and maybe sponsor more episodes. So much better than the MotorTrend episodes.

[@williamk5998]

Agree. Loved it

[@jeffreyvietzke228]

As a retired mechanic who had to work on these when they were new, I cried right along with Derek. And I'm still drinking, too. On these cars, it was rarely the computer that failed, it was the multiple, many sensors and their connections. Many of them were vacuum operated (BARO, MAP, etc. )A disconnected hose to the MAP would run it full rich. Bad CTS switch, same thing. Cadillac in those days (actually from 1980 to present) did and does their Quality Control using the customer as their test bed. Very innovative stuff, but halfway engineered, and most of the time, not ready for Prime Time. Another excellent video, and it brought back all the pain. Thanks, Derek!

[@jstil444]

This is the first video i have seen where you are very frustrated, but remaining very calm. Well done Derick. The flying brake drum was the highlight!

[@CriticoolHit]

When the metal rings came out of the broccoli ports and the camera man laughed a bit that really drove this episode home. You could tell we were all on this journey together.

[@James-zk2yt]

My favourite video ever! You look tired, clearly frustrated and possibly contemplating a gallon of petrol and a match to put it out of it's misery! Not every story has a happy ending, watching you work through the issues provided an insight into the workings of the Bieri Brain. Do a carb swap! Unleash the 6.0 V8!! Derek, you are the best!!!

[@tylerkilkenny8458]

The fact that you were less than two miles from my house excites me. I’ve been watching you since the beginning and you’re such an inspiration. The whole family gets excited every time a new episode comes on. Keep up the awesome work!

[@DconBlueZ]

Man I hate to see you struggle, but seeing you handle it without screaming more than once is amazing. I don't think I'd have put the fire out there at the end...Thanks for the video, always enjoy watching!

[@RLTango]

2:03:08 This is the Chef's Kiss! Total chaos for a few seconds with no one or thing getting hurt (at least not in the shop). I also salute the camera operator too - they ate dust, mice nest, fumes/vapors, plus, sat there next to that super loud exhaust. Well done, Derek and team!

[@realanimal3602]

Wow glad you said something before I watched a 2 hour video. Plus he's doing the work in a sponsors garage. Man this used to be a very man channel now it's a money maker for Derek and family. Hey, that's great for them, make money when the sun shines. Not so good for content, as far as I can see. Guess it's Low Buck Garage for me. 13:17

[@crowshooter223]

We LOVED this episode. My wife cracked up when the brake drum shot across the shop. You can't let this thing beat you. Toss a modern EFI system on it and make it a super nice, "Take momma out to dinner" rig.

[@garrylynch1516]

That's hilarious I was reading this right when it flew off😂

[@1_BlackDog_23]

Those early EFI systems are very reliable that is why they were used for more than a decade, problem is after the car gets past 10 years old the damn AC Heater box where it bolts to the firewall starts leaking when it rains and water makes its way down to computer and shorts it out! then most replace the computer with a new one and it doesn't work because they forgot to swap the ''prom'' the heart of the computer ffs lol I have a few of these cars i know too much!

[@garycamara9955]

Just put a damned carburetor on it and be done with it!

[@murraykriner9425]

From what I can recall working with all the TBI business the engine management was based on engine vacuum signal to atmospheric and manifold pressure sensors, the fuel pressure regulator, coolant temperature sensor, and the throttle position sensor. The AIC was the fast idle for cold starts, which didn't affect the Oxygen sensor until the engine warmed up. The over rich condition is likely to do with three elements; the coolant temperature sensor, weak springs in the fuel pressure regulator, and partially hanging fuel injectors. The fuel pressure regular should run at about 12 to 16 psi, which can be adjusted, while running a pressure tester in line. Hung injectors are likely the biggest culprit in this case, but that darned coolant temperature sensor will only make things worse if the TBI isn't near spot on. The ALDL, under the dash, can also be shorted to read off the ECU faults from the management system. There is a lot going on with these early fuel injection engines that slips past our notice.

[@MichaelRCarlson]

Thus is why we had those Sun machines, to help diagnose these emissions Era pre computer port stuff. Now with those machines all gone, working on OBD1 cars is tough. Probably the tougher Cara to diagnose and work on

[@xprettylightsx]

You sound like an engineer did you work for GM?

[@pitbullw35581]

Chevy injection system setup on this car is trash, the entire Chevy/GM/Buick injector setup isn’t good When all else fails, wack the computer

[@jobertvangool9961]

Believe me, if regular used, keeping all in a bit of shape ( just ignore the service engine soon light ) , tbi engines are close to be indestructible and never let you down.

[@jobertvangool9961]

I make daily use of the entire extend of the complete ADLD protocol to be able to see how she feels today and ignore the “service engine soon” light.😂

[@nite-eagle1]

I was GM tech in the 90s. Owned a 91 Cadillac. 864. I wish you could have heard me telling you what I did to make it run. I didn't sware !!! Loved this engine.

[@nickfarmer88]

This man has come a VERY long way since his early days on youtube. Its awesome to see his channel grow from building super budget 350 Small blocks to working out of the O'Reilly hq garage and that Roadworthy show. Congrats to him!

[@matthewpercefull]

The brake drum ...i cant even explain how much i connected with the expression on derek's face. That was pure emotion of nothing is going right oh great now parts are flying off all i can do at this point is just laugh. And i will say all i did was laugh for almost the rest of the video. I can never get enough of your videos if they go well or dont it is always a thrill to watch you work. Cant tell you how much i appreciate you and your family for all that you do.

[@mjc8248]

I worked on several of these at the dealership when they were still newish. I could rarely get one to run correctly back then even with the power of dealership part warehouse and up to date service bulletins. You did an awesome job just to get it running as well as you did. I would replace the temp sender. That's a pretty common issue with the early gm fuel injection. It can cause the injectors to fire full speed ahead if the readings aren't right. I used to know how to make these run, but it has been at least 30 years since I touched one.

[@nicksjustbored]

this thing sounds like a horrible design. When an experienced mechanic says "i used to know how to get these running" ;))

[@sometimesleela5947]

Sounds like they didn't do a proper sanity check on the value read from the sensor. Common in the first days of computerized engine management. I have this happen in robotics all the time when someone improperly characterizes a sensor's failure mode or when somebody changes the sensor specs/supplier and the software doesn't get updated.

[@MitzaMaxwell]

Oh yes, my twenty year old 1999 VW Polo had the temperature sensor changed more often than the brake pads, crazy. I sold it the day the mechanic had to give up because he couldn't figure out what was wrong with it. It just died when the engine reached operating temperature, without the computer registering anything wrong. So the error was not logged, so we never found out what could be done about it.

[@ozzierabbit587]

GM engineers may have felt they were close to getting these engines to work right in theory, but they just ran out of time.

[@LynxStarAuto]

@@nicksjustboredthrottle body injection was awesome! Dead nuts reliable. The 8-6-4? Yeah not so much 😂

[@BrokenRRT]

Around 1990 I bought a 1985 Elderado with this L6 motor and the body had the 864 badge behind the front wheels. I was 17 years old and second owner. Had no idea that it was rare till a game warden checking on me on side of the road told me it had to be ordered with that specific motor. Later found out it was bought and ordered as a fleet for a rental company in North Las Vegas.

[@markdawson4837]

Even though she didn't drive home, this was still a fantastic episode. The patience, perseverance and diagnostic progression you show is truly impressive. Shout out to O'Reilly for the support. Absolutely loved the brake drum's desire to get back on the road!

[@lolilolplix]

Ouch, spoiler only five minutes in

[@starnesandcars]

⁠@@lolilolplixsame but 11 minutes in😢

[@michaeljennings6240]

Derek you are one hell of a mechanic and guy….sometimes you don’t win….the way you held it together and didn’t give up and still gave us a great show was really impressive! I think it’s important to show it doesn’t work out every time…..push that one in a ditch and on to the next one! Appreciate the heck out of you

[@kevinwilson8302]

Derek, thank you for the entertainment that you have provided all of us over the years. I hope you and your family have a wonderful Christmas. Not sure if this helps but I have had a couple of different gm TBI vehicles, neither were an 864 system though. Both vehicles had major fueling issues exactly like the caddy and both were solved by replacing the engine coolant temperature sensor. The sensor on both had failed in a way that they were reporting extremely low temps to the computer, around -50F. The computer was demanding an extremely high injector duty cycle and would flood the engine. Not sure if you even plan on working on the car again but I hope if this comment finds you it helps you out. Good luck on your next adventure. Always looking forward to your next video.

[@ViceGripGarage]

Thanks for watching and merry Christmas

[@HughMyronM8]

I've run into the same problem with other cars. The temp sensor that the computer uses to control air fuel ratio goes bad and the car won't idle or won't restart when it's hot.

[@markusgarvey]

You beat me to it.

[@Ford4life885]

Shit I was just making my first video on my 1994 tbi 4.3 my temp goes up just driving in town but hit the highway and It drops I just replaced one of the ect sensors and I am still having problems but that honestly might help me out

[@gorebels2009]

As some have stated, I’d like to see an expert on these vehicles take us through the troubleshooting of this system in a “Pine Hollow Automotive” manner. The system should be running ‘open loop’ when cold so most of the sensor readings shouldn’t matter (except, maybe, coolant temp sensor.) I’m looking forward to follow-up episode #2.

[@cardboardboxification]

you just unplug the o2 sensor it will run in open loop tbi is easy you just have to manually go through everything 1# check fuel psi 2# check tps output voltage , that its smooth and not scratchy , check at computer also 3# use vacuum hand pump and manually check map sensor output voltage check at computer also , 4# check iac , pull out screw all the way in , and it should move out when key is on take back off and check thats about it it has 3 sensors , o2, map, tps until he checks voltages , and fuel psi , he isn't getting that junk running dumping fuel , fuel psi is off, or computer thinks its under load or bad sticky injectors if it's not pulsing , check injector signal pulse on a oscilloscope to make sure computer is controlling injector properly , if computer is pulsing and injector is spraying , Houston we have a problem and use a timing light to check that plugs are firing now you can just look at a computer and check the sensors live data on new cars instead of using your brain

[@poxic]

I would love it if you could find a local Caddy dealership who would be willing to participate, and have this towed in there. Film the young modern era techs in a modern shop as they try to figure it out along with Derek.

[@matthampton7349]

He is the Steve Erwin of the automotive world. Every project I watch I think “why is he touching that, he’s going to get hurt doing that, or he has no regard for his own safety” but it’s so entertaining and informative. I can’t stop watching!! 😂

[@edh.9153]

I have a friend that worked at the GM dealership in our town. They kept several new Cadillac's out back for donor cars. They would rob parts or just switch parts to make a customers car work. He told me they are all junk, and they won't stay running very long. You give it a good try. More than I would have. Thanks for the video. Ed H. Southwest Mo.

[@ambrosebrower8760]

I worked on a 4.3 tbi that was doing the exact same thing. It ended up being a plugged return line. A little compressed air through the line and it ran great afterwards

[@MrBillsfishin]

The rear brake drum shooting across the garage summed this episode up pretty good. I was cracking up then saw you doing the same.

[@peterwhite7041]

"That brake drum has moved farther than the car has up until this point... so...."

[@rev9fan1]

THIS! I almost died from laughing dude, good thing it didn't hurt anyone!

[@PurpleBox89]

And the engine sprouting a flame at the end...an almost literally cherry on top.

[@lawndart188s]

That was classic! I thought that crap only happened to me😂

[@o.c.smithiii2626]

I was helping my brother charge his A/C on a 1990’s Cherokee 4.0, and the harmonic balancer separated and the outer part fell out, hit my foot and rolled off just like that brake drum did.

[@enginebreak]

I think the video of Derek slamming the muffler into the car deserves to be part of the standard intro. Maybe right before or after Jessica drops the Monza. Also, Derek, there was a creeper hanging on the wall! : )

[@hammbone852]

This was hands down my favorite video yet. I greatly appreciate the time and effort you put into these videos as well as reaching these vehicles. Watching you fight through those issues while keeping a level head and still being funny about it is priceless. Keep it up Derek.

[@almightylunchbox]

I am impressed. The camera operator's ability to maintain composer was exceptional, Either they were extremely professional or thoroughly unamused. I was laughing for more than half of this video. I had to rewind several times so that I could absorb all the amazing dialog. Thank you, Derek for another beautiful video and thank you to O'Reilly's for your involvement.

[@mktward]

Once again Derek delivers another home run! Don’t matter that the car didn’t make all the way around the bases….what counts is that Derek’s attitude and his never give up rubs off on the viewers! Makes me a lot less frustrated when I’m working on my own junk and want to bring the tannerite….to just keep it cool and let it set for another day.

[@JustAnotherLuke94]

The entire series of muffler events at 1:05:00 had me laughing more than I have in years. A guy really needs to just say thanks for being you. You bring so much joy into my life even if it's only in 1 to 2 hr increments

[@Engineersoldinterstingstuff]

Seems like a perfekt fit for Derek. A factory car that randomly jumps from running 4 to 8 cylinders. Perfectly normal. Enjoyed this episode very much!

[@89JDmac]

Hey Derek, I think a carb swap would be awesome. I had an 83 Fleetwood Brougham that looked identical to this car except it had a cream leather interior and the 4100 V8. Was my first car so this episode was pretty nostalgic. Keep up the good work 👍

[@garyshields9277]

The brake drum leaving the garage on ITS OWN was classic! It told that you should follow suit. Great job at giving it your best. We have all been there. VGG is the best!

[@carlbernard4197]

The runaway brake drum was priceless 🤣 👌 😂 ❤️

[@LynxStarAuto]

The drum said it's time for a guy to go home.

[@dale116dot7]

On TBI injectors, usually the screw on top changes the flow rate, it sets the end stop for the armature and thus the maximum solenoid stroke. There are two adjustments that are usually factory set, between the two they set the injector flow rate and the offset time (opening time - closing time). I’m not sure if you got that top screw in the right place but if the injector is constructed like most TBI units I’ve seen, the fuel flow might be off if it isn’t set right.

[@hotrodtex2124]

My dad worked at a Cadillac dealership for 25 years until he died in a motorcycle accident. He was a mechanic there in the 80s & 90s so growing up I saw him working on cars just like this and couldn't wait for this episode to go live. I personally would love to see you get it running and on the road. Keep it TBI but remove all of the smog equipment, and add a Holley Projection unit to it. Also please take the Oldsmobile hubcaps off and some true Cadillac hubcaps in their place. Awesome episode and thanks for taking me back to my childhood.

[@bosty1984Fleetwood]

I seen those red hub cap senters went what the heck happened there

[@randallweeks5081]

i dont voice my opinion too often even when asked, but even with the headache and world of problems its still such a beautiful car and is begging to be driven. another feller suggested diving into the 8-6-4 system and figuring how it all works and with some luck and goat spit maybe it will come back around. either way the car is gorgeous and i think it should stick around a little while. keep up the awesome work lord of the vice grips

[@deaconblooze1]

Your commitment to struggling on your own, even when you have another person there is commendable.

[@jerrywilcox9890]

That guy is there to video that's it.

[@FamousEccles]

I love that we're essentially getting a full-length movie every week or so, just showcasing your genius! Thanks for the fun! 🎉

[@lastcoupe73]

I'm a master certified auto technician with 30 years experience. I specialize in electrical/electronics. I worked for a GM dealership for 20 years and won the GM mark of excellence award for electrical/electronics and HVAC diagnostics for 6 years in a row (every year the dealership participated in the program). I would say that you HAVE to have a problem in that Throttle body Derek. Maybe the o-rings weren't installed correctly on the injectors when you put them back in? Possibly a higher pressure fuel pump than the TBI needs like you mentioned as well. I can tell you this for sure, the ECM isn't pulsing those injectors just turning the key on, so if it's leaking fuel through the injectors before you crank the engine it's NOT the ECM causing it. So, when it is running and the ECM is pulsing the injectors, you're still getting excess fuel as well. Don't just scrap the TBI setup and throw a carburetor on it. This thing could, and likely will run good after you address those injector/FP issues. On a side note, regarding the computer code clearing, the process you were trying near the end of the video is to clear the codes from the Automatic climate control module, not the engine control module. If you want to discuss this or other issues you have with it lmk and we'll figure out how to get in touch. Thanks for the entertainment and keep up the great work!

[@dylantieszen8042]

Same

[@acabaconto]

Top notch camera person flow, covered all da angles.

[@jku72]

It’s refreshing to see when someone has a more accurate experience as I often have, to wit everything goes wrong, everything is junk, and it turns into a total ship show.

[@budbeard4175]

GM vehicles of that era would at times suffer from hard start concerns due to a failed coolant temperature sensor. One that has failed with a reading of -40 degrees will lead to massive over fueling of the engine. The O2 sensors of the era were slow to warm up enough to provide info to the ECM. The fact that you were able to leave the engine running while chasing down some parts leads me to believe the coolant sensor should be on the list of possible culprits. I hope this helps you. Keep up the good work. By the way, my Dad and Mom owned one of those and it worked well for them. It did have a slight driveline shudder when operating on 6 cylinders at a steady road speed. Other than that, it was very smooth.

[@1_BlackDog_23]

I agree Sensors i would replace, One of the TBI injectors was unplugged at the end is why it wouldn't fire up, computers sometimes short out and will cause it to run on only one Injector making it run like this.

[@bobbylee6859]

Coolant sensor woes without thinking about it is the worst. My first vehicle was a 88 4runner, I drove with a hard to start and rough when cold condition for two years till I noticed a loose clip on a connector. I tied that down and she ran great.

[@Mark-et8vh]

I can’t tell you how much I appreciate your videos. They have been a mainstay since last year when I came down with spinal cancer. Through my treatment and now my remission and the craziness in the aftermath, your videos just make me happy. Watching you wrestle the muffler and the cat off, was actually compelling. I’m easily amused, so that helps. Thank you again Derek - all my best to you, Jessica, and the boys. Merry Christmas!!

[@PetrolHeadBrasil]

And you beeing OK make ME happy, dude!!!

[@garykreil5990]

God bless you, if you feel like you are running out of options for cancer treatment, Appricot seeds can do wonders for some people. Look into it.

[@stephendee7839]

As much as I'm impressed by your ability to get cars running; I'm even more impressed that you're able to convince people to sell you their cars. I've been attempting to buy a car for over a month and most people absolutely refuse to have anything to do with anyone who doesn't live within a 5 mile radius of them no matter how much I'm willing to pay them.

[@rhs.m]

The whole muffler battle killed me lol. Derek, you truly are every good old boy and I'm sure I speak for most of us when I say we appreciate the honest representation in media 😂

[@051570orion]

I'm just now watching the muffler battle , and scrolling through the comments and yeah that's hilarious

[@ronhytoff6385]

One of the funniest episodes so far, the muffler removal was one of a kind.

[@Rockardo_]

Was thinking the exact same thing, to many times i've been under a car just yanking on something just cause for some damn reason it wont release on whatever its stuck on

[@jaythecanuck4905]

The dedicated camera man is a great addition.. this video was very professional looking.. you are stepping up your game in a big way.. and the content looks great man!

[@donaldvanderborgh1817]

When I worked at a small town GM dealership in the late 80's, one of these engines came in. I asked the main mechanic about them. He gave me the Coles Notes version, but he told me the idea behind the workings and what they did to fix it was disconnect the "brains" and just ran it as a normal all the time V8. Love your channel ❤️

[@juniorsaxman]

My 92 caddy had the same issue where after resetting ecm it would start right up but the second attempt things would go haywire. I put in a new ecm and bingo many things were fixed. Clogged fuel injectors from a vehicle sitting long periods of time will destroy the fuel injection transistors in an ecm. My caddy would start up at 4000 rpm eventually when the computer bit the bullet. Installed new ecm fixed it

[@Camperfanatic01]

As a kid, my neighbor had one of those caddy’s. All I can remember is he always had the hood open working on it…. lol….. the most memorable time with that car was when he was trying to track down some issue and he took the hood off, and sat in the engine bay, while he had his son drive down the road. What a sight to see as a kid about 10-12 years old…. 😂

[@danielvarnell5095]

I feel like if revivals were a video game, this would be the final boss. Thanks for always giving us fantastic content!

[@Pure-Luck447]

😂👌

[@xrtango]

My Summer Car - US version - difficulty impossible.

[@caseyraychek5181]

Awesome comparison

[@CS-oe8og]

You did better than a lot of guys could have just by getting it to run!

[@chriswest8376]

I have taken a lot inspiration from Derek. There seems to be no project he won't tackle. He has incredible self-confidence and he doesn't lose his temper even when frustrated. As a long in the tooth shade tree mechanic, electrician, plumber and carpenter, my experience has taught me to be extremely cautious about taking something apart that I am unfamiliar with. However, after watching Derek, it occurs to me if it is already broken, I probably won't make it any worse - get the wrenches and go for it.

[@jimmyalber]

Derek, you put more effort into fixing this monstrosity than I expected. These engines and their electronics were problematic when they were new. Now, 42 years later, forget it! As soon as I saw what you were working on, I thought we were in for an intake/carb swap! Nice looking car though. Good luck with this one!

[@djmidg]

Hi all. I've been following Derek almost since the first You Tube video, and never seen him work so hard on a project 'drive home'. All credit to you, Derek. This type of commitment and stubbornness reflects who you are. Not only does it make great viewing, but it also inspires and educates those who are interested. Personally, I'd love to see you 'win' with this car - whether with Holley EFI or carb conversion. Merry Xmas all. 😊

[@markellis7831]

Derek! Check coolant temp sensor resistance. Had same issue on old tbi 350 and when it goes bad it defaults to like -50 degrees so it will dump way too much fuel and flood

[@brandonlebel8560]

I second this comment. Had the coolant temp sensor fail on pretty much every terminator broccoli injected vehicle I’ve ever had

[@petertornabeni602]

It’s great that companies are supporting you Derek ….. we ALL want to see more videos

[@OldsmobileSBRocket]

Check the temp sensor. Very common on TBI trucks, goes full pig rich. The resistance reads like -100 outside.

[@ViceGripGarage]

Will do!

[@sfritts]

​@ViceGripGarage Make sure you check the one near the thermostat, the other one on the side of the block is for the gauge. I'm currently battling a rich condition on my tbi TransAm and haven't figured it out yet.

[@maxhammontree3169]

@@ViceGripGarageyou better!

[@JoshuaDoret-nx4pr]

Came here to say the same thing, bet the sensor and connector are full a green cheese

[@BrodeyDoverosx]

This. I diagnosed this myself years ago and two GM master techs disagreed with me. I went to disconnect the temp sensor and the plastic broke in half. Those techs ate their shoes that day.

[@MyName-tj4zj]

If you and Eric O from South Main Auto could collaborate on a part 2 that would be cool. His diagnostic style on electrodigicals is incredible.

[@richthepontiacguys1412]

I was thinking same thing Eric O is really good at old school computer cars engine swap would be good I guess Derick has gotten cars running and driving that been sitting for 30 Years + with less trouble One worst cars Gm has made Can you manage buying that car new and having that problem what a rip off

[@fishhuntadventure]

I’ve said that before. VCG goes to upstate and buys a “pile” and Eric O whacking the language bad with Derrick would be awesome

[@jaycarva]

That would be the best collab in history.

[@LeighPankhurst]

Derek yelling "NO!" at the engine when it wouldn't run was awesome!

[@MrDoyle07]

I had one of these really expensive Chevvies - a blue one - beautiful car. It looked really nice. Nice to sit in. Lots of electricalized toys. Nothing on it worked but the electricalized stuff on the interior was good. I could let the kids play with the power seats and watch the windows go up and down... ...until the battery went dead. That was mostly because it would not run good enough to re-charge the battery. I will pray for you, Derek. If it's any consolation to you they really are nice to look at. Get a weed whipper to keep the grass short around it and use it for a lawn ornament. All that said, Derek, you are a champion! There is an upside to all this agony, at least you are not out laying under this in the ice, snow and winter dripping car nightmare. Hat's off to you!

[@peterbzonek5108]

I admire your tenacity and learn something from each video. As a practicing physician for the past 35 years who has seen way too many preventable eye injuries, please put on safety glasses when cutting, drilling or grinding ( especially when you are under the car ).

[@danhanczaruk437]

same exact problem that i fought for months. coolant temp sensor. i replaced everything, even tested and had a good reading on the coolant temp sensor that was in it. forum after forum i finally took others advice and replaced it. fixed it right away. mind still boggled. need to change it. its right on the intake manifold. great work. love the channel.

[@brianpancake2186]

The tbi on my 91 chevy hydro locked that engine the same way. Problem was the coolant temp sensor.

[@richardvienneau6128]

I thought the same thing sense they same thing happend to me twice in my 94 van

[@yamishdoy]

I was also thinking the coolant temp sensor, as it could send an in correct signal to the Engine Control module.. To be honest i have no idea how the Cadillac system works, I have had multiple Volkswagens not start due to a faulty coolant temp sensor.. Again its only speculation.. Amen to all those who had to work on this nightmare!!

[@RoninDosho]

Derek, You definitely took one for the team. If/when you get it home, put a carb on that thing and replace the computer, get it running and sell it. You did everything possible and then some, which is a testament to your years of experience. Thanks for everything you do, even when it doesn't work out.

[@bb5242]

Just the fact that he had a nice shop to work in with all the tools except a lift, as well as the main O'Reilly warehouse right there and he couldn't make that massive pile of hoses and wires run right tells you everything you need to know about how difficult that one was. Wow. Respect. Do a cool swap, or at least show the FI delete process and how much it would clean up the power barn. What a terrible mess, and it perfectly foreshadowed all the pain to come in the current day. At least today's FI cars you can troubleshoot better and they're not just a single model year type deal.

[@bigjohnson7415]

LS swap it! 🤣🤣🤣

[@davelowets]

New coolant temp sensor, and it might just run fine... If the coolant temp sensor is faulty, and it's reading real cold, when it's not cold out, it'll make the injectors EXTREMELY rich and flood the engine immediately.

[@lezivanerrol3697]

5 minutes into the video and that thought immediately crossed my mind.@@bigjohnson7415

[@thomastessin1663]

I installed a fuel pressure regulator, carb and plain HEI distributor. Worked fine after that. The computing power was too little, too late. The GM nebulizer injection never was any good.

[@davidflanders8990]

I'm watching the '72 Marquis Brougham right now and just finished the '78 Rotbird. You're a trip but I love watching you do what I wish I could do! Keep on finding, fixing and driving! Thanks for the videos!!

[@JTabarlet]

Someone needs to do a compilation video featuring all of Derek’s descriptions of the smell of a car’s interior. “PROCESSING…PROCESSING…A mahogany axe handle wrapped in wet woolen socks.” Classic.

[@emersonringrose8480]

My favourite was "A prosthetic leg stuffed with bandaids". Genius

[@AlAllerton]

They did a compilation like that a couple years ago I think it was. Like at the end of the year or something. There was a couple other surprises in there too.

[@northof-62]

America's answer to Jeremy Clarkson

[@xdboardsurfer]

The "smells like" compilation. My favorite is dog vomit and moldy raisin bran. Lol!

[@chrislemaster2695]

Smells like Chicken noodle soup and Gym Locker when he smells the int of a 1968 Buick LeSabre that had been sitting since 1987.

[@mckay86]

This was a massive Rollercoaster of emotions for 2 hours straight! You Sir are an incredible good mechanic! Give this thing a Carb, maybe this will make this Junkyard a running system. Thank you so much for your commitment and thanks O'Riley

[@carlbernard4197]

He has WAY more patience than I would have had with that car 😮😮😊

[@jerryvanhouten3801]

Once again, Derek has the patience of a Saint. Most people would have sent it to the crusher when it appeared to be jinxed. The brake drum taking off was hilarious! If I recall correctly, these early systems didn't have many sensors. The primary ones were throttle position, manifold pressure, and coolant temp. The O2 sensor was just a mixture trim that didn't get used until the engine warmed up. There had to be something wrong with the fuel system though. The injectors shouldn't dump any fuel until it starts cranking. Not sure if there was a port for a scan tool on something this old but that is the easiest way to check the readings on the primary sensors. The OBD I systems on GM would also flash codes at you on the check engine light if you jumped a couple pins on the connector. Crude but better than nothing. Camera man did a good job keeping out of the way and capturing the action.

[@natewj1077]

Its definitely the coolant temp sensor, i have a late 80s k2500 with the 305 TBI and had the exact issue. The ECM relys on MAP, and coolant temp on start and warm up, which determines idle, timing and injector pulses. If you unplug it, it wont run right, but should run better, with less fuel being dumped in it.

[@jacobdimock9191]

I would check the coolant temp sensor, also the connection with the to corrosion on it after you plugged it in the car ran a lot better,that was probably the coolant temp sensor. The coolant temp sensor will default to minus 40 degrees and gives the car the fuel it needs for minus 40 degrees.

[@lancespencer962]

I agree thats why they make a repair pigtail for it with a different style sensor.

[@Creek_gravel_garage]

1800 for that Cadillac is a smoking deal! My grandpa used to have one like this, and he had all kinds of trouble with that cylinder management stuff. He ended up putting a motor out of a junk yard caddy he found ,and i helped him. One of my first and fondest mechanical memories. Nothing quite like spending time with your grandpa. I miss him tremendously

[@TexEP]

My Gramps has been gone for over 30 years now and I still miss him, but with fond memories!

[@THX-vb8yz]

Grandparents are the best

[@bullbutter9699]

No it isnt not this one, 800 would of been generous.

[@bmwpete65s55]

It's a smoking deal alright. Sometimes fire too!

[@guygallaway3093]

I worked at a GM dealership when this car was new. A big complaint from Cadillac owners with the 8,6,4 system even if it was in perfect order was the continuous incessant lurching and hesitations from the transmission shifting up and down and the torque convertor locking and unlocking while the engine was shifting from 8 to 6 to 4 cyl. modes and back. The smooth rolling Cadillac ride was compromised without any significant gains in fuel mileage.

[@frankmiller7960]

Awesome as always! Too bad it didn't drive home but a carb swap or even Holley fuel injection swap would be a promising fix I would think. Keep doing what you are doing and stay safe!

[@SweatyHanes]

My father had one of these back in 85, pearl white outside and Burgundy inside with the gangster wide white walls, all the bells and whistles. He was an architect for the US Army and passed from complications to agent orange in 87. I vividly remember going to town on the car with markers on the drivers side as as a toddler. ii later found out in life I was his last of 17 kids.

[@christopherarmbruster6241]

Oh man I bet you can't get rid of that too soon. Looks ant everything. And plastic is everywhere.

[@cheetahlip]

That’s a wild ride 😂

[@NoCoolNamesAvailable]

This is definitely one of my new all time favorites of VGG. I have a 1980 Coupe Deville, and it runs great (just don’t expect much top end power!) I always thought the V8-6-4 was an interesting idea and so far ahead of its time. Unfortunately, like the Oldsmobile diesel, they were rushed to the market before they were ready, and I think this contributed to the loss of public opinion of GM long term. I also like the longer show 😅format. Your camera operator has a great presence of mind to capture the brake drum carnage and not just get out of the way! I really enjoyed that you went for something “a little different” and not just the same old “here’s a new carb and now it runs good.” Towards the end of the video it definitely seems like maybe you were suspecting computer issues, and rightfully so. The fact that the computer didn’t want to reset codes also seemed not right. I had a similar experience with a 1995 Ford truck with the 300ci 6cyl; it would sometimes run just fine, but sometimes it would barely run. I tried multiple times to get the computer to report codes and it wouldn’t cooperate. What ended up fixing the problem for me was pulling the computer and replacing the electrolytic capacitors on the computer board. Like clutches, electrolytic caps will eventually fail…it’s just a matter of time. People that repair old TV’s and radios often have to replace the leaky caps. When they fail they can leak all over the circuit board and ruin it as well. The fact that cars see extreme temperatures usually speeds up the process of failure. Check out @shango066 channel; he’s repaired a number of ECM’s over the years. Cheap fix and worth a shot, before trying to track down a replacement computer.

[@Omgninjas2]

I'll second bad capacitors in the ECM. On a lot of older avionics the main things that fail are the capacitors. Especially the ones in the power supply. They'll go Tango Uniform and then I'm sending in another box for repair.

[@thecarguy455]

I can back that up from my days of working on arcade video games. I had to replace the capacitors on many many boards so the displays would work correctly. I still do it with flat screen TVs that people discard because they don't stay on. New capacitors on the power board and I get another TV for cost of some parts. Have not paid for a flat screen yet ! Only one I couldn't fix was a !&$@#$*!@!! Plasma !

[@nathanpolkoski5277]

Had a 300i6 like that. Would usually run good but then would run rough at idle and I could not figure it out! Drove me nuts. As soon as you were in the throttle it would run good besides a buck when getting into throttle after gear change

[@kathyscott]

Thank you so much for the laughs in this episode. I about lost it when the wheel drum rolled across the floor. Hubby said to tell you he felt your pain, as a mechanic he spent many years working on old cars because that is all we could afford. Sometimes nothing went right like the issues you were having. Frustration compounds the issues. You did your best and sometimes it just doesn't come together. Better luck next car😅

[@TheSeanUhTron]

That brake drum making a run for it. 😂 Really though, the V8-6-4 engine was really cool from a technological standpoint. It's something that many engines use these days, but back then, the electronics just weren't up to the task. These were the days where they were barely getting EFI figured out!