What's Wrong With This SMOKY C-15. Cat Engine Smoking.

[@Squib1911]

Good diagnostic in the beginning of why the diagnostic tool couldn't communicate with the computer. I think adding detail like this to your repair videos shows a whole lot more about what it's really like to be a mechanic.

[@snoopdogie187]

I've had the same OBD2 issue on two different GMs. Both had a bad fuse, but it is shared with the power outlet, so it is easy to overload. I think I also did it to a Ford van, but that I knew I blew the fuse, so it wasn't really something I had to diagnose. I'm guessing it is a similar case here since the port is sharing power with something else, but no compliant about lose of power on that, so it can't be anything too noticeable.

[@royalcrowntowing2464]

I was just asking are you gonna drain all the diesel out of the cylinder

[@oldbloke100]

@@royalcrowntowing2464 he did that with the brake bleeder, vacuumed it out.

[@rearspeaker6364]

@@snoopdogie187 run into that often on private fleets.

[@taselescanlan2795]

@@oldbloke100 yeah I always do, it will hydrolock the cylinder. Most of the time I crack a line closest to the cylinder. It also relieves the fuel pressure and allows the inj to come out easier. I work on cat gensets and most are a lot easier because they are not inside an engine bay and everything is easier to access.

[@colemc.5917]

You have taught me so much about the operation of Diesel engines and have really pushed me towards a future career in the diesel industry, light or medium-heavy duty. Thank you.

[@ianthompson2802]

Do you want to work on on road diesels or off road? Bc I am making much more than my class mates who are working on on road diesels I am making in more than a classmate who has several years experience with on road diesel I am making about a dollar more an hour than him. Work on off road equipment try to get into the cat think big program. I didn't and I'm working at a smaller shop don't make thr mistakes I did go for cats training what states you live in if you live I n the same state I'll recommend you througbt my old boss who knows the owners of my local cat dealership to get you ahead I fucked up by going to the wrong trade school but you won't. I have to fight tooth and nail to prove people who learned on trucks can pick up equipment. But if you learn on the right stuff you will make dealerships pay much better than me

[@robertmaybeth3434]

Good choice. I spent 30 years working for a government fleet for a large west coast city (I recommend government employment 100%). I was not a heavy equipment mechanic, just a service worker, I made around $50K. The "heavies" made around 70K and there was a lot of overtime so they were always up for that. But, the guy that fixes the equipment is going to have a lot longer career than truck drivers and even equipment operators. Self-driving is something the world's fleets are going to switch to the very moment they are ready, is why, but it is going to take them along time to make self-fixing ones.

[@taselescanlan2795]

I went to UTI, work on diesel generators now. I can tell you going to UTI will open the door to almost any job. I’d recommend going and working at a shop first so that everything makes sense in school. And don’t worry about the pay, find a job that will invest in YOU. If they make you do grunt work and don’t teach you technical stuff, move on. Your body will only take so much in the field.

[@Iowagrown123]

Working for the government, and that's all you're bringing home? ​@@robertmaybeth3434

[@camshaftP16]

Weird, just changed 6 injectors in a 6NZ today, what I do to remove the fuel is take the return fuel line off at the filter housing and run it into a container then remove the other fuel line to the front of the head and blow air into it till all the fuel is out of the head. another good video Josh, keep them coming.

[@marioshroom1]

I come from the generator world of diesels, it’s always fun to watch other techs diagnose issues in their field. You follow the same logical diagnosis path as I do, start with the simple things, use all your senses, and use the proper tools. Great work you do man!

[@donniceblakely1075]

I've been doing this for years, this young man is good at his trade! Great job with diagnosis.

[@tihspidtherekciltilc5469]

I was about to buy a lake boat for $7k when I got a nicer boat free because the crankcase filled with water very fast. I used the compressed air trick to find the problem which cost a whopping whatever JB Weld cost and three gallons of cheap oil. Four years and going strong.

[@musicauthority7828]

You might have just been lucky if it was just fresh water. however if it was coolant it will wipe out all the bearings.

[@larrytalley117]

Wonderful video...even an old electrical/mechanical engineer like me can follow along. Always concise, well edited and to the point. Merry Christmas Josh.

[@kingjames8283]

When I was having all the trouble with my engine earlier this year, I finally bit the bullet and got a new cylinder head which had to be made for my engine, and six new injectors, and new jakes due to sticking plungers and all my problems went away. Truck was down for 6-weeks so I had to rent another one. While my engine block and components were the same as all previous iterations of my engine design, the cylinder head was of a newer design using chrome parts and none existed anywhere. So a new head was cast and all new parts installed. Cost me a small fortune however the shop had to eat some of the cost as it was their tech who caused the damage of the old head when he installed the head gasket upside down during engine rebuild. The entire firing deck was pitted bad. Truck runs like a champ now.

[@Szarmack777]

Always a pleasure watching a professional do his job!

[@DoRC]

Yeah my dad was an old school mechanic and he had that same opinion about people using computers weren't real mechanics. Unfortunately this led him to not really being able to fix modern cars. You're absolutely right that you can't really touch a vehicle these days without knowing how to deal with its electronics. Everything is controlled by the computers and if you aren't talking to them you're not listening to the vehicle.

[@dodgefan1259]

That’s one thing that I hate to hear about “old school” mechanics. These guys were there while things were changing, learning new things every day. Then they want to give up just because it’s electronic now?! I never understood the closed mindedness toward electronics. But you are right! Can’t touch one without a computer! I’d like to see one of those guys try to troubleshoot after treatment without any computer!

[@snoopdogie187]

@@dodgefan1259 I think part of the issue is the original software was clunky and not well engineered to make it easy to use, so they had a very steep learning curve towards the end of their career, which makes it not worthwhile for them. Younger generations grew up using computers, so even if something is a bit poorly programmed, we aren't struggling to use the basic function of the computer, and also figuring out this program. Think about how long it took some people to switch to smart phones, and I still know a few people that aren't using them (although they are because even modern flip phones are actually low end smart phones).

[@chrisleggett685]

When I started in the repair field 40+ years ago I had no idea how complicated and computerized things would get. I am terrible at diagnosing new stuff. I just can't wrap my head around it. So I stuck with older stuff. All the shops around bring me the old stuff they can't fix. If they can't plug in they can't fix it. Put some points in a tractor a few weeks ago. They new guys didn't learn dwell in school lol

[@DoRC]

@@chrisleggett685 I guess I'm fortunate. I learned all the old school stuff from my dad and then taught myself all the modern stuff

[@WilliamPayneNZ]

Age isn’t an excuse you just have to be open to learning new technology. My dad was born in 1944 and he got really into computers in his older years. Also I know a mechanic who ran his own shop for years and he was near retirement when I met him, he went out of his way to learn every new thing as he felt it was part of the trade as a mechanic to be able to fix current vehicles.

[@badcompany7674]

ive watched your videos for years now and have learned a lot from you. i have to say youre a rare mechanic. before i knew much about engines i remember the hassle of going to multiple shops and getting charged for not finding an issue only for it to be something small and stupid. like this one time where i use to work we had a dump truck with a 3406E that had a major power issue. boss took it to many shops with no resolve and got charged thousands for many ATA pressure checks only for me to find out it was a cracked turbo band clamp on the compressor housing. i wasn't really allowed to work on the trucks outside of greasing them and changing lights but i felt this was an easy fix that he was spending way too much money on finding and one day while greasing it i took a real close look at the turbo and with the truck running could hear a slight boost leak with my ear up close and felt a little air escaping the band clamp. fixed it and the truck ran awesome after words

[@mikehardin7086]

I watched this video a couple months ago. I bought some indexing pry bars like you suggested. Those things made a couple tasks way less frustrating for me. Sure glad I bought them. Thanks for the tip.

[@Darfur64]

Good info, just bought a FL70 with a 3126 (190hp 295k miles) that smokes white smoke. Guy who sold it said it needs a motor, but it just had huei and injectors about two weeks before he put it up for sale. I'm wondering if they got a bad reman injector. I'll ask the shop to do a cylinder cut out test to see if it's one cylinder causing the smoke. As always, appreciate your videos

[@markm0000]

That is extremely likely. Reman injectors are always a crapshoot.

[@ai_university]

@@markm0000 reman HEUI injectors in general are a crapshoot.

[@chrisleggett685]

We have warrantied 2 sets of cat reman injectors in an excavator in 3 weeks.

[@johngnang6724]

I'm 69 years old.There's not a day that goes by that I don't use the computer.You post great videos.Keep up the good work.

[@spartancam1159]

i love the 3/8 stubby. I'm a diesel tech at a Peterbilt dealership in California and I'm primarily a transmission guy and that 3/8 is great for removing and installing transmissions. its small but has a hit!! defiantly worth the money.

[@jw4620]

Watching young guys work is nothing short of amazing, whether it's the guy who built my exhaust system or one of the online guys like South Main or Pine Hollow. Their trouble shooting techniques are a thing of beauty.

[@edenfieldjared0]

Thanks for sharing. I have a Detroit but am trying to get a cat soon. One of your videos previously stated that while different diesel brands are very different the basic principles are the same. I used the tool that you are using here the brake bleeder as you recommended on a previous video to purge/ prime the fuel rail and vacuum cylinder on my first injector swap on a Detroit 12.7 and just like you said it would work on any diesel. I also used the same pry bar you used here or same type to pull the injector. Thanks for all of your wisdom. I am an owner operator and when I can instead of listening to the radio in my truck I listen to your videos and when I can sit still watch them as well. and they have taught me a lot!!

[@russianrick8403]

I have a Diesel engine that is running just fine, but after watching your videos I always end up with a feeling like I need to go work on my truck ;). I love your content, keep up the good work!

[@tomdavis3038]

If it ain’t broke don’t fix it. It’ll need something soon enough Cheers

[@russianrick8403]

@@tomdavis3038 I'm so glad that you sent me this comment today! I am in the middle of a complete overhaul of my fuel system after trying to be cheap and putting bad fuel/water in my truck. I was wondering how I could clean anything out of the cylinders as I'm replacing my injectors and Adept Ape gives me the answer with his use of a brake bleeder. I've got one of those :)

[@boatbutch]

Just give ‘er clean air, clean fuel and keep ‘er cool.

[@steelwitness]

i find it fascinating that you do the stuff with the computer. im used to mechanical and watching you deactivate that cylinder like that was pretty cool. cant see how anybody can hate something like that

[@9983sp]

You make a whole lot of sense, and your videos are straight forward, and educational.

[@gmupps]

Love that comment about needing a computer to work on these. I get calls from customers at my fuel injection shop looking for advice on say a no start condition on a common rail engine. They get their back up when I ask them to check their rail pressure during cranking, because the only way to do that is with a scan tool. Granted if they had one they likely wouldn't be calling me looking for free advice. IMHO a scan tool is just as essential as a socket set when working on a modern vehicle

[@keiferjanz3197]

Yes but low rail pressure issue is troublshootable without a lab top. Your fuel return for a HPRC will be a good indication if you are building rail pressure or not. If you are getting way to much fuel return on cranking then its process of elimination by isolating the 3 parts of the system.

[@gmupps]

@@keiferjanz3197 Oh I'm aware. I usually end up telling them to KZbin a fuel return flow test. Still easier to start with a scan tool. Even cheap ones now days will give you live data

[@keiferjanz3197]

@@gmupps Even more important then the scan tool is the understanding of the system. Plugging in is always a good starting point but ive also seen it lead people down rabbit holes lol. At the end of the day a diesel engine is a diesel engine, they all need fuel, air and compression to run. There is a lot of simple things to check a no start or any issue before needing to plug in. I follow a keep it simple stupid tree when troubleshooting. Complaint of electrical issues, check battery cinnections, check fuses, customer said they checked, double check them lol. Engine no start, is fuel in the tank, is fuel supply good, is air filter plugged off yada yada.

[@markgeyer3591]

Great Video!..I'm a OLD mechanic, and it is Very interesting to watch your Video,.....I worked on 53,71,92 series Two Stroke stuff,...I always wanted to work on Yellow paint stuff, but I got volunteered by my Boss to work in the Detroit area

[@bottlersolutions6739]

After 3 skillsets in 30 yrs, I still am entriqued by diesel engine repair.

[@landonbrown6568]

I’ve followed your channel for years now!I’m great full for you!I enjoy your Vlog this one is the best one you’ve done in a long time!Thanks👍🏻

[@RobertJr.-fw7fb]

I always learn something about my CAT Engine every time I watch 1 of your videos...love it ..I have a Bxs Acert but very informative to see the trouble shooting process

[@semistop8594]

Going through the troubleshooting steps was really cool. Very helpful. Way cool man. Thanks!!

[@taylorjay5918]

I am pursuing H.E.R in Zambia at NORTEC College and you have really helped alot thanks

[@ericb3061]

excellent presentation. I think you explain that very well I like watching your videos it helps me with my cat C15. It makes me more knowledgeable about my Engine

[@HorusGodEmperor]

one of the most interesting videos I've seen in a long while on youtube!

[@stephenellis4392]

Merry Christmas! And I wish you a very good year to come!

[@emadshakir-lx2uk]

Thank you my dear friend for this effort. I wish I knew how to speak English to know what you said in the video. Or to be with you to master this field of work that I love. I work in the field of electricity and generator faults. I love mechanics..your friend Imad from Iraq. thank you.

[@mbowen007]

Awesome video! I never miss an episode! Keep up the great work

[@slowaf12v]

Great Video Josh!!! I second the thought that without ET you CANNOT diag these engines properly...been saying for years as I to work for a CAT dealer

[@jacobking6966]

Very simple cylinder compression test, way cheaper than a kit. Great video man👌🏽

[@BigSkip304]

I like the way you explained that. Couldn’t have done it better myself

[@badgerpa9]

Quick education video. Thanks for another troubleshooting video. Have a Merry Christmas.

[@musicauthority7828]

You are correct many of the tests you performed would require a scan tool. but some wouldn't for instance anything that is electronic like all the sensors,the injectors, and performing the cylinder cut out test, and the ECM values. and even the electrical system. the starting system, the charging system, wiring problems, bad connections, and like in your case blown fuses. which you did the correct procedure because you have be able to have the data Link connection. but the things like the visual inspection of the. mechanical parts, and the cylinder leak down test, wouldn't require a scan tool. there some technicians that will use an endoscope to look into the cylinder. and some service centers will equipment for testing injectors. and ultimately what the technician wants to end up with if testing the injectors. is when injector releases the pressure that it's at the correct pressure. and that the spray pattern is correct. and it shouldn't drip any drops of raw fuel. most of the time the nozzles will be damaged from the violent explosions in the combustion chamber. however some diagnosis can be hard to pin point. like bad connections, burnt wiring, and bad grounds.

[@cullenmiller8170]

Precise and to the point diagnosis. Yep good luck to properly diagnose anything without a computer these days. The guy that doesn't use a computer and proper diagnostic techniques is usually firing the parts cannon and will install a set of injectors instead of just replacing the broken one. The good old days of pulling the injectors out and quickly pop testing them on the bench have long gone. Merry Christmas.

[@hamish2202]

The good old days are still around for me man td42 and 3l

[@robpeters5204]

Since you were right there at the end with the injector out, you could have uses a bore scope to look at the cylinder walls and the top of the piston. Just to rule everything out.

[@philliphall5198]

A good temperature gun is a big help and great guide to problem area

[@bretyoung1869]

Great job 👍🏽 Really enjoy your knowledge and great abilities !!! You make it look so easy, take care Josh !!!

[@morgansword]

Very well done!

[@slumgaming8165]

These are the most helpful videos on diesel engines KZbin has to offer. Do you offer training?

[@ClipSwitchFlashlights]

In my experience, it's extremely rare for a CAT electronic unit injector (3406E, C15, C12, C13, etc.) to cause this issue. I'd be interested to see if this one acts up again after being parked outside on a cold morning. Head gasket blown from a cylinder into the saw cut of the head is the most common cause of this type of issue (if there is no blowby upon startup and the valve-train is working properly). You won't see any signs of coolant in the oil and some of them don't even use coolant in the beginning stages of this failure. They usually blow towards the back so, in this case, you would pull a head bolt between #4 and #5 cylinders to check for carbon. It is easier to try an injector first though.

[@rearspeaker6364]

always start with the simplest solution, then go towards the complex.

[@musicauthority7828]

He varifide that it was an injector when he did the cylinder cut out test. when turned the injector off with the scan tool it quit smoking. and when he turned the injector back on with the scan tool it started smoking again. that tells you everything you need to know. I have been an automotive technician for pretty close to fifty years. I've even worked on some trucks during that time. which doesn't matter the principle is the same.

[@jondavidmcnabb]

Solid diagnostic work!!! Excellent video and technique

[@sankar7055]

Very good video, nice to know to check the compression of the cylinder by blowing the air.

[@brianmax8147]

I was told by an old school mechanic that when you have a electrical problem in the wiring ,to always let the smoke out of the wires first. He said that usually fixes the problem .

[@WhiteTrashMotorsports]

Only problem, I haven't figured out how to put it back in.

[@skeezix8156]

First try and fix it with a hammer, if that doesn’t work you have an electrical problem. That’s when you let the smoke out. Next step is to leave a progress report for the next shift

[@griffgriff9718]

A real mechanic 👍

[@albertosi87]

Hello there, great diagnostic whenever I see a video of yours I learn a lot. I just started to study become a diesel tech. What would you recommend me to do in order to learn pretty well in this field, because it is something that I enjoy. Greetings from Barranquilla Colombia.

[@curthazlett595]

We had the same problem the head gasket was bad and using the head bolt cavity as part of the combustion chamber. Finally figured it out we pulled the head bolt out to take the head off for further investigation.

[@michaeldunagan8268]

@7:00. Yah- - I use 3/4" cordless on my Toyota Solara control-arm bolts and spun the welded caged nut. I wish I saw this video before taking on the project. Break-bars from now on

[@crusiethmaximuss]

Love how you troubleshoot a diagnostic. I would have started with the fuse box, too when dealing with no communication. Glad it was just an injector and not a major mechanical problem. That could have gotten expensive RIGHT NOW!!!

[@rearspeaker6364]

always start with the simplest solution, then go towards the complex.

[@cameronturner7475]

I still have an old bench pump for testing nozzle spray patterns. I'd guess the nozzle is bad (peeing out one side). Would be interesting to see a spray pattern on this one. If so, it's probably those Napa filters. They were good enough on the older systems but not enough on these newer ones.

[@kerrygleeson4409]

Merry Christmas🌲Josh & family thanks for another great video 👍

[@tylerhall6455]

Great vid man. Been watching your vids for a few years now. Thanks! Im happy to hear you can test a cylinder out with just a air nozzel. I was thinking you were gonna do a leak down test or compression test with some fancy gauge or something but I guess thats not needed for just checking for major function and such.

[@anuradhabandara7878]

Thanx a lot for this kind of videos. These are really valuble for us.

[@norcalray7182]

That's a AWESOME 👍 JOB.

[@keiferjanz3197]

Yes a computer is helpful with electronic engine but not always necessary for dealing with common rail injection systems. More zo use full with electric unit injectors. A typical test performed for hpcr is measuring return fuel from injectors, rail and hpcr pump. Then physically doing rail cap off tests too isolate the fuel injectors. I've done cut out tests and you'd think issue was all cylinders, physically isolate each injector one at a time and isolated it to only being one. Ive also found great use in thermal image, normally a bad cylinder will ether be way hotter or way colder compared to the rest

[@Redsfanatic32]

A computer is almost 100% necessary all the time for proper diagnosis. On common rail engines, HEUI engines, and other electronic injection systems, if you don’t have a diagnostic scan tool, you’re flying blind. You can’t read fuel pressure, you can’t read pulse width, injector balance rates, can’t read hpop pressure on HEUI engines or the ipr, on common rails you can’t see rail pressure desired versus actual, there’s a ton of things you’re missing out on without the proper electronic diagnostic equipment.

[@keiferjanz3197]

@@Redsfanatic32 I work as a field tech for a heavy equipment dealer, work on lots of equipment where i don't have the EST to plug into different brands of equipment and can manage to troubleshoot just fine, i can go weeks without needing my labtop... now some weeks I use it daily...the tool is only as good as the person intereptaring the information. As stated above i gave a very real example of how to troubleshooting a suspected HPCR issue with out needing a labtop. But I'm not saying plugging in if able is not a good starting point.

[@rprzen2099]

Kind of a quicky cylinder leak down test. Typically you would have an apparatus with a gauge and pressurize the cylinder and time the pressure decay when turning the air off to get a good picture of cylinder/engine health. But your method is quiet common to make a quick determination. Good video.

[@rearspeaker6364]

no way to put pressure into cylinder without removing a injector.....

[@jddiesel7409]

Ha, you mentioned c7 injector removal. I still have all my homemade slide hammer attachments and short pry bar brackets for rear engine school buses from when I worked at cat. Lots of pumps and injectors.

[@deant876]

I'm an in-house mechanic for a small company (we have 6 trucks). I keep telling the owner that we need to get a computer to help me diagnose drive ability and no starts. But he bought me a code reader instead. He thinks just knowing the code is all I need to know, I can Google what it means. Then he complains about how often I send the trucks to the dealership

[@wazza33racer]

some truck owners knowledge would on the back of a postage stamp...........did some driving for a large farmer in western NSW Australia. Guy had late model tractors,harvesters etc and two CAT powered heavy trucks.......the guy didnt even know what valve lash was on an engine, or that the 20 year old trucks he bought had turned over on the speedometer at least once or twice........he actually believed these beat to hell trucks had only done 900,000km.............more like 2,900,000 km's.

[@prevost8686]

You’re in a no-win situation. If money is that tight with him he’s not going to pay you anymore than he thinks he can get away with.

[@marktiitto7616]

I been working on cars 43 years started when cars had no electronics . Now you gotta have a good scanner .If you don't your just guessing..I wouldn't work in a shop like that.

[@702BattleBorn]

Yo AA. Methodical and efficient. Thanks for the content. Have a Merry Christmas. Happy holidays. Cheers.

[@AdeptApe]

Merry Christmas to you as well 🎄

[@YousefOhadi]

Really thank you very much because I benefit from you a lot.

[@ZylonFPV]

Very interesting. So did you replace the injector and all was good?

[@localcrew]

Yeah, you definitely need a computer to work on these engines. Doesn’t mean you can’t or shouldn’t examine the engine visually as well. 👍

[@keithmalatesta7660]

Love to see some closure of fix.... ie... new injector install and first start with clean exhaust.

[@terrydavis6132]

Good to see'ya back bud , I was worried they might have put you working out in the field after you did the ' working on equipment ' video haha .

[@benh7868]

Another great video, thanks Josh.

[@bonidaexpress]

happy holidays Adept

[@willkincaid5841]

I like the old school leak dowm test 👍

[@ratrod3598]

I have that little pry bay exactly for what you using for.

[@mickromer6199]

You can actually use a pry bar to hold the injector rocker down, levered off Jake housing to manually cut out the cylinder on a C15.. not recommended but if you haven't got E.T its an option. And if it works it works 🤷 haha Old bloke showed me that when I was an apprentice, can do it with series 60 Detroit too 👍

[@andrewpassman8621]

You mentioned using a computer to trouble shoot. A lot of mechanics back in the day had trouble shooting equipment. Computers of the day. Point being is computers/gauges/ test equipment have been around for a long time.

[@lestheindependentunlesslik6882]

I went through injector problems it was a nightmare finally got a cat man to put all new cat injectors runs like a champ

[@geoffreymills9932]

Had the same smoke problem with a 3406e turned out to be #5 had dropped the oil nosel in the oil pan, that was only the beginning of the problems I had with that pos, I went back to Cummins and finished my 27 year career breakdown free

[@_N_B_0496]

Great video as always man! So, was it the injector for sure?

[@rearspeaker6364]

we like to know...........

[@chipperfluffy]

That's some knowledge!

[@loi4lifeklite]

Thank you for sharing your knowledge and experience. Great video.😀🇨🇦🇵🇭

[@itsFsmitty]

Josh, thanks for making this videos, their really really helpful. 👍🤙

[@YousefOhadi]

Hello my friend, greetings to you from Morocco.

[@ryandungy151]

Love your content bro

[@timf6916]

Good job

[@abpsd73]

The computer diagnostics is a tool, and like any tool needs to be used correctly. Many techs will plug in and see something like a sensor code low/high/etc and replace the sensor, and not fix the problem since the sensor is reporting a symptom of another problem.

[@stoneyburk961]

Good video! Well done.

[@MDSaddam78604]

Good work 👍

[@g41thomas]

Great video very informative 👍👍👍👍👍👍👍

[@johnwilliamson6143]

I have seen head gaskets blow between cylinders and cause the same problem. White smoke that will start to clear up as the engine heats up

[@Iowagrown123]

Little, to no noticeable blow-by would also suggest reasonable expectation cylinders are in good condition. Especially with that much exhaust smoke.

[@brianjohnston9822]

I had to watch the ending twice. It would have been nice to get an affirmative conclusion that changing the injector actually did resolve the issue.

[@festus51]

very good video very informative thanks

[@Rosy_87]

I liked the detailed diagnostic video. I dont have a C15 but I enjoy learning new things.

[@brownwrench]

Would a relative compression test have been a good check also for the cylinder condition? That might spare you removing an injector needlessly when the hole is bad.

[@rearspeaker6364]

not all diagnostic programs have that feature, for a particular year.

[@matildastanford7019]

@@rearspeaker6364 huh?? What do you mean by "diagnostic program doesn't have that feature"?? At this point it's a mechanical diagnosis not electronic. All mechanics would have a compression tester surely. It's a relatively simple matter of installing it into the injector port & with all fuel shutoff from the engine (so it doesn't fire up) and crank it for a few seconds. The test would confirm that the cylinder holds compression and that the rings, gasket and valves seal properly. I would've thought that Josh would do that test as opposed to using shop air like he did and like brownwrench brown wondered why he didn't is all.

[@rearspeaker6364]

@@matildastanford7019 some years on some vehicles, relative compression and injector cutout are not supported- you would know if you were in this field!!!

[@aleksy5686]

Thank you for the video👍

[@geraldwalker1848]

Great video 🚛🚛

[@philliphall5198]

Dam I miss fixing them It was my life and 57 years of it

[@oldlincolnpipewelder]

Great video!

[@neilfrancis4382]

Hi loved the video i have a 6nz that is going into Limp mode for a few minutes and then comes out the shop said it was a Is fuel problem Change the bunch of stuff still have the problem Any idea????

[@johngoldsmith6629]

Define limp mode. I call it when throttle sensor fails and you have to use cruise switches.

[@logic9869]

Mine was a blown head gasket.Antifreeze getting in exhaust and coming out the stacks.U could smell it in the air

[@fuddmethen]

love these vids

[@nicholicampbell138]

Very good