Toyota "New Year's" Time Machine...No START when HOT? (Part 3 - 1987 MR2)

[@themechanic6117]

Didnt the owner drive like 6 hours ? Only for it to be a bad ecu that the owner already had sitting in a box of spare parts? Id try plugging in the new ecu before taking a 12 hour round trip and hundreds of dollars for a diag 😂 . I swear some people just want to have their car in one of your videos . Like the guy that drove for a few hours because of a trans problem that turned out to be the owner didnt properly fill the transmission. Great work as always Ivan

[@Charlie1012000]

Thank you for running every conceivable variable one after the other, no guess or chance like any other parts changer. I learned a lot!

[@ferrumignis]

It might look as though the crankcase vent goes straight into the inlet manifold but it doesn't. There is a passage cast into the manifold that routes the crankcase vent back to the throttle body and exits on the air filter side of the butterfly so there is no strong vacuum on the crankcase vent (as you discovered).

[@larryberry2436]

On the old O2 sensors, I would use my body as a resistor, one hand on positive battery, one hand on the O2 wire going back to the ECM, and then switch to the battery negative to force low voltage. You could actually hear the engine rpm change going from extreme lean to extreme rich. You could also see the change on a 4-gas analyzer.

[@JoelAutomotiveInaction]

That test is not valid 100% , we did that experiment 5 guys in the shop , only changes the voltajes with 2 guy the other 3 not at all , body resistant changes from a person to person depends the amount of alcohol in the blood😊

[@benjaminrich9396]

I've been loving this series of videos Ivan. I like the quirky 'old modern' stuff. :)

[@Megreatbellend]

I’m an industrial electrician, and I love to watch your troubleshooting technique. Your videos are informative and just plain entertaining! Cheers and Happy New Year!

[@nickchannel5364]

I have a job in the residential remodeling side of electrical work, but I can't progress past installing receptacles. Do I just need patience or am I at a dead end?

[@jluna1279]

​@nickchannel5364 depends on who is holding you back. You can look for companies that will offer you schooling while you work for them. Usually the bigger companies can afford to do so.

[@saulgoode5923]

Messing with old Toyota's is fun. I had one with a shorted injector that was stealing the power from all of them. Only the cold-start injector fired once, truck started, then it'd die. It got a computer and then 4 new injectors.

[@JoseSilveira-newhandleforYT]

Great job, Ivan! Seems the corrosion in the circuit board of the engine computer was setting a bias in the sensing inputs. A lot of work could be avoided if you knew you had a spare, but all those other checks were important too, as you now know everything operates as it should. Cruise control should be a breeze, by comparison :-) Happy and productive 2024!

[@mikefoehr235]

I tbot it was neat that you could adjust idle rpm by looking at your laptop. That is pretty neat. Your channel is one of my very favorites to watch.

[@davidhollfelder9940]

Airflow flap sensor: substitute in a potentiometer to see what voltage point/range gets a good idle run. Never mind .. the ECU was (as Shango says) was “baked”.

[@myidisinhim559]

Lol...I feel like Im watching a mini-series with cliffhangers. Ivan's playing us like a fiddle 😊.

[@brianw8963]

Couple minutes into this and I knew it was the ECM…. That’s just not true! I thought it was going to be that pitted up throttle body, looked like it was soaked in hydrochloric acid for a week. Great stuff Ivan. 👍👍🇺🇸

[@neilmortimer2206]

Had a similar problem on a older car, stalling when hot. The car had been to several workshops, it ended up being a warped intake manifold. Had the manifold machined, fixed the problem

[@truhntrz3408]

I am amazed how thorough and diligent you are in troubleshooting! Shortcuts and guessing are not in your diagnostics. Man, So. Cal sure could use a tech like you here. 😊

[@dustcommander100]

Great work once again! This whole process was way over my head, I'll admit it....

[@tambotambo10]

Ivan some of the air vane meter have an adjustment screw on them ,they normally are covered by a plastic bung.

[@jeremyah78]

You da man Ivan! Being on the clock, standing over that engine (this era is just about as challenging as it gets), thinking on your feet while all the possibilities play in your head, and getting to the bottom of it without throwing a single part at it…. You are the real deal! Everyone has guesses, but when they have stand over that engine bay and think critically about it, I’ve seen many-a-mechanic have absolutely no idea how to handle a car like that without just aimin’ n’ firin’, before just shrugging their shoulders and shipping it still broke!

[@davidblaze1652]

Ivan , you've nailed it 👍.Those old Toyota without scan data can be a pain . You're ending 2023 like a Champ 🏆. Please Feed us with more videos series like this in 2024 🎉.😅

[@dfields9511]

Makes you really appreciate the modern scanners , great work there.

[@ronaldderooij1774]

Well, he had a thorough engine check up at least. But I am a bit critical that you did not see what was in the box in the first place. Truly, that would have been the first thing I would have done, just out of sheer curiosity and it is "nice to know" what is available before getting on to the job.

[@phillharris3154]

I was going to task the same thing. I assumed Ivan looks through the spare parts before starting. Part of a routine? Oh well, Ivan must have felt frustrated!

[@Mr2004MCSS]

I would have looked inside the box in the beginning as well to see all what was in there and what possibly had been replaced. I was questioning the computer from the beginning after seeing the water staining and that he could not remove the screws to get inside of it.

[@v12alpine]

I'm more curious why the customer didn't try swapping the computer himself before driving 6 hrs to Ivan. In part one it is mentioned he was working on it himself for a year supposedly.

[@edwinlomonacofoolsend]

So another one I learned from you. You could have used a decade box to reduce the vain airflow voltage and see if ran better. But man.......that's a lot of work only to find the answer was in the spare parts bin the whole time.

[@jessicav2031]

Yes! The voltage being different tells us everything! I bet you you could fix it too. Those blue resistors on the left look like they got pretty toasty, one of their values may be off or it could be a partial short, but you know where it has to be. With a board that sparse it would be easy to trace out the nets for the MAF input and check everything on them 😁

[@paulsullivan6392]

What a journey. Very unfortunate the owner didn't mention the spare computer. It would have saved soooo much time and effort. Oh well....stuff happens. May the new year bring you and your extended family, happiness, good fortune and good health.

[@drm315]

Maybe Ivan should have looked through the box?

[@zhdpa]

Why did the customer buy the computer but never put it in?? Im sorry but these 3 videos were a complete waste of time.

[@sumduma55]

​@@zhdpathey weren't exactly a waste of time. They went through the interconnected components and what could affect them to verify a functional state - when you do not have live data to make it easier or more convenient. In most cases, you are more likely to find an issue there before a faulty engine computer. As for why the customer didn't say anything about the spare computer or try swapping it out himself... think about the average person and their knowledge of cars. They might know how to change the oil or spark plugs but the vast majority bearly know how to get someone else to do those things and put gas in them. And then there are the ranges in between before you even start getting to people with the knowledge or skill sets to get to a computer. Someone likely told them they aren't made anymore so if they want the car to work in the future, they needed that spare. Putting two and two together was likely beyond their skill set in this case. They probably have a collection of hard to find parts that someone else recommended having, threw them in a box and set off to have someone fix the car. I can only guess though.

[@JoelAutomotiveInaction]

​@zhdpa did you learn any techniques? I did so I did not waste my time

[@johnwhan7288]

Ivan you are simply tenacious. I feel sorry for the car that tries to fool you. Engine computer last was not your fault as before you found it called it. G.J.

[@jatco84]

OMG...what an oand such intensive diagnostics. Great job there....Finally..!! Phew..now a Classic car is up to snuff and on the road. Kudos to you...again.

[@claysonwebster1622]

This is why I always respect the technicians who use to work on these types of issues back then, no live data, no Bi directional, no scope just a multi meter if your lucky

[@PineHollowAutoDiagnostics]

I would refuse to diagnose one of these without a 4-channel scope LOL

[@cclngthr]

​@@PineHollowAutoDiagnostics This is one reason I got the 8 channel scope. Although on the pricey side, I can look at multiple things at the same time to see how everything works in concert with each other. I have the 4 channel Pico scope as well as the 8 channel Pico scope and in the end with older cars I use the 8 channel more often because it allows me to see more data so I can spot harder to see issues.

[@ebolti22]

@@cclngthr How did a damaged computer affect the car's poor performance?? Was it giving too little fuel??

[@cclngthr]

@@ebolti22 Anthony's 1959 Studebaker Silver Hawk doesn't have a computer. It had a mechanical fuel pump, but the fuel was not pumping at the right rate and volume to run the engine even with the 259 cid V8. One sign of this is how much fuel is in the fuel filter.

[@redtopberries]

Im glad the customer didnt mention the ECM. Im enjoying this series😊 thanks for the great content Ivan

[@southhillfarm2795]

Can’t help but be impressed by Ivan’s diagnostic skills.

[@edogle8163]

Wow Ivan you didn't have to up date the computer to 1987.... I received my mug today and drinking coffee while you fix this car,nice mug....

[@gregwarren8583]

Love that you did your full diagnosis before jumping into the computer.

[@EdsVideosRcool]

The positive side of this adventure is Ivan has on video shown the base functions of how this MR2 from 87 works. Now the unknown is known and preserved for future diagnostics. A Haynes manual would be far off from this specific diagnostic. Awesome job Ivan! Happy New Year to you and yours!

[@kostelectronics]

Respect!! I worked few years on a Toyota Corolla from the same area with the same symptom (with carburetor) and 10000 vacuum hoses and everything was vacuum controlled on this car! i had 7 service manuals and none of them matched for the vacuum system because different layouts depending on the country emmisions law. finally (after about 30h work) i found a broken membrane in a modulator. this was a nightmare!!! i thought you have something similar here!

[@gmtech2012]

Right as you hooked up to the VAF sensor to check range, I got the idea to check the guided component test in the snap on scanner. Always underrated info for these older cars!

[@nv1493]

I'd love to see the original ECU redone by one of the prime KZbin electronic repair guys.

[@nevillegoddard4966]

@@nv1493 The board in the ECU may just need a clean with some isopropyl alcohol & a toothbrush? - Maybe? I saw a rusty-red stain about a half inch diameter across a number of tracks & solder pads on the solder-side. Were there any others? I may have missed them, but hopefully, not too much current has flowed where it shouldn't have, to actually damage any of the electronic components on the board. Then the owner will have a spare, working, repaired ecu with 'no parts required'!

[@reneneron2971]

Not that many years ago, you could purchase a working ECU for these cars for $50 or less. Hard to justify the labor to clean and install only to find out it still doesn’t work. Diagnosis / repair is expensive. We don’t know Ivan’s arrangement for this series, or how many hours he has into it, but with this car (and the previous Audi) diagnostic time is usually valued at $180 / hour in most shops. These older cars are typically labors of love by experienced enthusiasts for a reason, as you’d quickly be bankrupt if you had to pay others to service them.

[@nevillegoddard4966]

@@@reneneron2971 Well if they're a labour of of love, then enthusiasts WILL pay specialists the money they require, for the specialist jobs they can't do! Lol! You don't make sense mate!

[@reneneron2971]

@@nevillegoddard4966 Ivan has more than 10 hours into this car. I suspect the ownerx and dad did ,almost all of the work to get the car to whst is it…and, as shared in the lsst video, $12K invested so far to get it to what it is as delivered to Ivan, and it was still just marginally drivable (they were actually very lucky to hsve it where the ECU allowed the car to run AND the intermittent ignition system did not leave them stranded. That is a labor of love…if they paid someone to do all the work, it would be far more than what they have invested. It was a year of work, likely averaging many hours every week (and perhaps full days on weekends). It is a tremendous commitment that I appreciate, but many do not and abandon the projects. Interestingly, Ivan makes many of the same points at the end of video 4 which I just watched today.

[@RobertAllen-b2t]

Almost 200,000 subs dude , when you get there celebrate with a garage build or a garage update. Raise them roof and come out ten feet. Your current garage doors cannot except a lifted truck. Love the vids. Keep going.

[@alward9901]

I’m not sure but I think Ivan is restricted were he,s living by-law . Can’t build permanent repair facilities . (Farmland ) I think he mentioned it at one point.

[@tpctrash]

I don’t understand what you do most of the time lol, but I love watching how you do the progression to the answer. Very logical. Great channel. I live in beaver pa. Nice to know that someone with your skill set is not too far away.

[@Izzy111R]

Fantastic work, im too nosey not to have had a rummage through that box before starting any work. Hindsight is a wonderful thing but maybe in the future it will save you a lot of time. Very interesting diagnosis though.

[@stevestadnik9206]

You triggered old memories of working on these old pre data stream cars. I have I few old scope captures on a very old thumb drive. One was a 1987 Camry VAF. Idle was 3.3V and with a WOT snap dropped to 0.42V so it worked backwards. If I could link a pic, I would. This was with the Mastertech scope module, single channel. Also in diagnostic connector, there is a pin labelled VF which I believe is some kind of caveman fuel trim feedback voltage. I have a scope capture of a good running car. It is a sawtooth waveform from 2.9 to 1.6V. Keep up the good work Ivan and wait the next video.

[@ebolti22]

Why was Ivan's Toyota running lean at idle when the MAF was showing high voltage? so he was rather adding fuel

[@stevestadnik9206]

They are both the same vintage Toyotas, but maybe the calibration is different? The scope capture I have is 20 years old so I don't remember circumstances. I am assuming my specs are known good or I would have annotated the capture.@@ebolti22

[@mikechiodetti4482]

Customers don't always give information related to the problem. It can take several phone calls, text messages, or emails to get most or all the info. Been There Done That. Anyway, glad to see the engine is running normal now. Good for you Ivan! Hopefully the cruise control problem will be much more simple to fix.

[@lynskyrd]

good job Ivan- you stayed the course. Yes, the guy brought a box of parts- would have been nice to pull out that 85 ECM and connect it up. Still a good series. Bring on 2024.

[@proven6270]

Nice.... As a previous Toyota tech, group leader, lead tech Shop foreman @ Toyota IN THE 90's........ I left in 1995....... Usually Toyota ECU's ARE bullet-proof AND not THE ISSUE............NEARLY ALWAYS......Again nice Ivan..... 👍

[@donniejohnson7499]

Hello Ivan !! Awesome troubleshooting. I'm looking forward to seeing the finish. I'm a retired mechanic. I sure enjoy your videos. Happy 2024. Thanks for sharing !!!

[@mikebaz7843]

I remember on my first car when I knew pretty much nothing, it used to idle too low at times and nearly stall, with no diagnosis whatsoever I bought another ecu from a wreckers for $30 and it fixed the problem 😅

[@robertkeime4907]

Thanks for doing such a great job teaching us how to diagnose.

[@mikesvirtualgarage9917]

"Bingo!" All variables were exhausted and you werent kidding. Take that vacation and see you in 2024!

[@claudiosantana3320]

wow thank you for filming stuborn diag and being thorough

[@Teenagegoogoomuk]

Cool stuff Ivan, Ah yes the bridging of the electrons. lol It will get you on a humid day as well. Ole green crust, oxidation, and rust can be conductive as well as destructive. Get ya a can of freeze it, used it alot on circuit boards back when I repaired TV's and circuit boards back in the 80's, solder iron for pin points on boards. Now days with all the apps and gadgets like your pico can get you right there.

[@russellhltn1396]

I'm wondering why the customer had an engine computer and didn't try changing it himself. It's not like it had to be reprogrammed or anything.

[@PineHollowAutoDiagnostics]

I also had the same question... Would have saved like 6 hours of diag time 😅

[@xboxbml]

Makes for a good diag video though..!

[@golletim]

I know Ivan is trying to be thorough....but shouldn't his extensive troubleshooting knowledge focus on the most likely portion of a diag tree. It drives me up the wall I guess he wouldn't have videos and multiple hour diagnostic fees...maybe he's saving for a boat. Thoroughly inspect that damn ecm....ya, we know it's running lean. It's gotta have green crusties on the inside.

[@PineHollowAutoDiagnostics]

@@golletim What's the "most likely portion of the diag tree"? The goal is to be as efficient as possible to get to the root cause of the problem, not to rack up the diagnostic hours LOL

[@golletim]

I just saw the end.....not trying to troll😮

[@davidwright2706]

I had a similar problem with my 95 dodge intrepid. Only instead of pulling the fueling too lean it was going full rich just dumping fuel into the engine and after a few minutes running the catalytic converters would start glowing red. Turned out to be a bad ECU as well. Took 3 months to find another one as they had long since been discontinued. Great job, these are the types of problems that make even experienced techs pull their hair out.

[@demcomp]

Amazing diag video! Originally i was on the fence with either a sticking injector, or a bad ECM... Looks like it was a bad ECM. As soon as i saw the water stains... I figured ECM

[@noelcastle3986]

Another great video especially as its early computer intergration with minimal access to data . I modified a spray booth to confirm to fire prevention regulations back in the late eighties and the panel beater was working on a badly damaged MR2. We became good friends and once it was finished took it for a big drive it was considered state of the art technology back then and was a great car. Seeing this video shows how far far engine computerisation has come it looks so old school especially the crude air flow meter and with all the vacuum operated devices and piping mostly for emission controls . I enjoy your videos and how you explain your thought processes . Anyway another great year following your channel hope bigger and better things for you and your lovely wife into 2024 .

[@rogerrocco5211]

Congratulations! I knew you would keep going until you finally found the problem. “Persistence is Omnipotent.” You are awesome to watch! An amazing problem solver who is growing exponentially with every challenge. Failure is not an option for you because you are always composed and think logically. Bravo for a master mechanic!

[@braddofner]

S Novym Godom! Health and happiness in the new year. Love you, bro!

[@petepeabody8905]

What a dilemma. First off you want nothing less than to please the customer with his rigs issues with efficancy. Then you got the customer staying at a local hotel and his patient level is nill to none. Normal customer reaction. You can only do your best and let the chips fall where they will. I always enjoy learning from your work.

[@williamgagnonroadboxservice]

Wow 1 minute into your post and I’m number 4. I guess we are all waiting for you.. And we are off and ready for the fix. Thank you Ivan

[@1954307]

brilliant work ivan you are the man, but as you said in the video its a shame you didnt look at the ecu in the first place...but still educational....keep them comming

[@fredautos]

Satisfaction:. Thank you for restoring another 152k mileage to that vehicle:! Ivan you definitely need a vacation Happy new year🎉

[@wayneguibas5260]

Happy new years Ivan. Visiting friends in dubois with my family. Thanks for all the great videos.

[@paultaylor9939]

Great job Ivan it took a minute but like you said got rule out all the others components first cheers

[@stagggerlee]

I hope the owner fixes the Swiss cheese under body of that car. That is a disaster looking to happen. The owner left the spare at home because he was afraid it would fall out?!?! Lots of holes below the ecu... Great troubleshooting learning how undocumented system works. I don't have that much patience any more. ;) Happy New Year!

[@mattbrown5511]

All that for a known issue you found early on. That must be frustrating to beat the bushes. Well done on all the other diagnosis, however. Can't wait for the conclusion.

[@notsureigaf]

Man, the owner must have been pissed knowing he had the solution in his parts bin the whole time. Seeing the state of that original ECU, swapping in the spare would've been one of my first moves and probably would've saved a fortune 💰

[@7443jan]

Thanks for sharing all your knowledge. Of all the 60 channels I follow I always look at yours first. Happy New Year!

[@bnewton239]

great video series. i guess next time inspect the spare parts box ha ha

[@tsxownz]

best gift to that mr2 is fit a 92-95 honda civic efi system. trick part is the ignition distributor.for best results all sensors need to be fitted, specially the iac valve. response is largely increased and pretty sure +15hp are achieved. those ecu are fully tunable, so boost is not out of the question

[@mikeburdi3464]

Im liking this series! Nice job Ivan! 👍🏼👌🏼

[@major__kong]

I just repaired the board on a power supply I had laying around but didn't want to throw away. And I'm not even an electronics guy. You've got that engine computer repair! Hahaha 🤣

[@raymondreiff8170]

Nice Completed Job, Was definitely fun to watch for ending 2023, Can't wait to see what other Cool rides You get back to Perfect running again 🇺🇸👍

[@lucassantos-du5dv]

I like when many people know what was wrong 😂..not as easy when something else is hiding...Good job as always..

[@rickclayton1806]

I am amazed at your restraint for not breaking into that computer earlier.

[@hooptierescue2540]

Nice save Ivan! Next step was the LS SWAP!

[@Michael-yi4mc]

My 2000 Sienna had rough idle and no stalling when hot. I replaced the temperature sensor and the engine now is back to normal. I boiled the defective sensor to check a difference in resistance and it had no change difference from cold to hot.

[@jeffreysmith2223]

Ivan, important lesson,, always check to see what bit and pieces are included with any car you're looking at. Customers are like medical patients, they rarely tell you the whole story, you need to ask questions and probe the answers you receive. Great video, considering you had no knowledge of the spare computer. Might also be an idea to always open any module that shows signs of rust and/or connector corrosion. Happy New Year bud.

[@solardiyhobbyandrevies8118]

Bad solder used in those years hit the computer solder joints with some fresh solder.

[@rainerrieck6596]

I have an Opel or Australian Holden Astra 2003 with a Z2.2e motor and I had the same problem trying to find a PCV , in short there was none either and i found crank fumes were sucked in just before the throttle body by venturi action, so always oily on the plate and air intake idle sections.

[@jerryking2418]

Another brilliant diagnostic.

[@danieljurgill1681]

The O2 sensor adjustments when warm and above idle added to the complexity. The O2 adds another variable. My 85 GM Tuned Port , uses a .45V default for O2 when unplugged.It is sometimes best to unplug. Also my car uses a default for the MAF and for the TPS when unplugged.If the TPS is unplugged assuming there are no other problems, it will produce a high idle. If the MR2 had this TPS capability, the car would have stopped stalling at idle with the TPS unplugged, but would have mask the real ECM cause. On my 85 Tuned Port, this MAF high voltage might have set a code 33. The diagnostic for it would be voltage checks for the 5V reference and for 12 volt supply voltage to the MAF, using the analog and digital ECM pins for ground, not battery ground. It seems to me the ECM is developing an additional voltage drop when ECM is warm, probably on the ground side. The amount of voltage drop is the difference you measured between the original and the new ECM for the MAF circuit. If you could measure the temp of the ECM and the time it takes to die, and compare it to the original ECM after it came out of the freezer overnight, it just might prove that the ECM would run a lot longer before acting up because the initial temp from the freezer would be 0 degrees F. It seems it took a longer time for the engine to die when starting from a cold engine and ECM , than what it took when the car was already warm. It also was harder to start.

[@Barbars-14]

Oh heck..the customer should’ve provided a hard copy list of all the spare parts he had provided…😵‍💫😎..terrific diagnostic work Ivan!!!

[@fastwalker21]

I would think it a good idea to go through the parts box thoroughly in the future to save some time and frustration in the future Ivan. What a total PITA !

[@billziegmond4943]

WOW Great Job my friend. Happy New Year to you and Amanda.

[@valperiandri6055]

At 33:18 next to that JIS (Phillips) screw, it looks like that brown glue that becomes conductive. You might want to pick that crap off. Norcal715 runs nasty PCBs through the dishwasher with a low heat setting. They come out looking new! Just because those electrolytic caps look good doesn't mean that they are. They should be checked for ESR! Ivan, you NEED a Blue ESR meter! It can do more than check ESR on caps. You can check low resistance very accurately down to the hundredth of an Ohm. You can check the internal resistance of batteries. It's a very nice tool for not much money!

[@rodneymiddleton9624]

Don't forget the EGR modulator!!! Thanks Ivan!!

[@lvsqcsl]

I can understand your dilemma. You spent all that time trying to do troubleshooting when you could have just plugged in the engine computer. Now, how are you going to charge for the time you spent? GREAT VIDEO!

[@turner0224]

Ivan check all your vacuum lines, there’s a crack in one that expands when the engine gets hot. Look for a poly line (clear)….most likely at the point of connectin

[@johnplump3760]

The computer is the last thing to suspect. It is the mose expensive. Great Job

[@PineHollowAutoDiagnostics]

Also easiest to replace 😅

[@Paramount531]

I would have put my money on the vane airflow. In the late 80s I pulled the engine from a Volvo DL (red block 4 cyl, not the POS PRV 6), to send out for a rebuild. After I put the engine back in the car, it would either barely idle or not at all. I eventually figured out the problem, I had omitted a clamp that had fallen in my oil drain pan under the car. It was between the airflow sensor and the engine, so there was a huge vacuum leak. Upon replacement of the clamp it settled right down and idled nicely. I have never made that mistake again!

[@OscarSegundo]

Had a similar experience with my 89 Toyota Truck. Valve lash was off, adjustment was too tight. It would start right up cold but die when warmed up. Had long crank times and had very little power although it drove anywhere. Once i adjusted the valve lash it starts right up everytime and never stalls. Not sure if this engine is similar to a 22r. Symptoms are identical and everything checked out just like this.

[@PineHollowAutoDiagnostics]

This has bucket and shim valve adjustment, that I've never seen go out of spec compared to the rocker arm and tappet system :)

[@JC-yt1pm]

Ivan the great I learn so much from you, thank you!

[@paulsolovyovsky1702]

С Новым Годом! Great video as always, have a happy New Year

[@gregwarren8583]

Ivan, Just now watching this video Those VAF meters would have sticking vanes (common for all mfg's). Take the tube off it's inlet and physically move the vane. Should move easily to WOT, then snap back fully closed.

[@billsmith5166]

First to say congratulations on 200K!

[@mikeaho4143]

Great vid Ivan. Just wondering if you are still going to bypass the EGR as it looks like that in the engine compartment. Just wondering if that will make anything change ? Very interesting diagnosis and case study.

[@CarlWilliams-u3y]

No. You don't want to bypass the EGR. It'll cause valves to get burnt.

[@hugh007]

Just curious. Why would the valves burn? EGR only came about in the 70s. No burned valves before then.​@@CarlWilliams-u3y

[@CarlWilliams-u3y]

@@hugh007 Cars with EGR valves prevented burnt valves. It recirculates the exhaust to cool off the valves. It recirculates excess fuel not used to burn it.

[@nevillegoddard4966]

Excellent video series as usual! Thanks Ive! Rivetting as always! Seeya next year! 😃👍

[@RichardPflieger]

Holy smokes Ivan! Did the owner provide a new starter motor too? Great diagnostics old school.Years ago I taught this stuff. I was a Sun electrics salesman.

[@MattExzy]

Pwaor, what a cliffhanger this all was. Lots of folk mention capacitors, but it could be anything - values of all electronic components can drift over longs periods of time, it's hard to rule in or out any single component.

[@PineHollowAutoDiagnostics]

Yeah I was surprised that the ECM caps looked mint!

[@2nickles647]

The flapper has a pentionometer inside the black box. Its just silly Coned in. I took my brother mass air flow sensor apart because the flapper was sticking at the close position. Once i cleaned out the flapper. Sprayed some silicone spray and then let it dry a bit. Cleaned the contacts with an earsier tip. Reassemble it and the truck would stall anymore. Before he dropped it off. He said it would hesitate bad. After i cleaned it. She ran smooth as budda. He drives his truck out in the dirt roads alot. He also didn't clean the airbox or air filter as he was supposed to. After i cleaned the air box too. She ran smoothly. Of course his Cornputer was never touched by anyone.

[@jgeorges3061]

IAVN, thanks for the great diagnoses approach was fun to learn more information and tricks what to see and how to watch the scope data. Happy new year hope 2024 will be much better and full of more success. cheeeeers

[@vg3430]

Happy New Year! Love your content…thank you! Why didn’t you look to see what the customer provided? I know “swaptronics” is not always recommended, but if you had this ecm all the time, and it doesn’t require programming, why in the world would you not simply try it waaaay earlier in the diagnosis?? How many hours of wasted diagnostics is the customer paying for?!?!. If I was the customer, we would be having a serious discussion on the bill. Looking forward to 2024 content!

[@mattyb7736]

Hi from New Zealand, wish id seen this right at the start of the series. These are well known here for corroded ECM units. Swap the ecm and away they go.

[@adamtrombino106]

Welp, those of you who commented on the ECM as the trouble, deserve a kudos. The reason I didn't condemn it from the get go was because in 30 yrs of working on cars, I've only seen 3 Toyota computers take a dump. Granted, none were an MR2 of this vintage, and yeah i saw the water damage too, but knowing how many failure issues these cars have besides the possibility of a computer, I took pause on that. Ivan tested everything, the way it should be! That's the way I was trained in the 90s by GM..test everything, then condemn the computer. I will say had Ivan had the Red Brick with Asian cartridge and connector, he might've found the issue sooner. I kinda want to know if the good ECM still showed the IGT ( i think that's right) drop out on the scope, even though the car was fixed.