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Come along with Eric O. when he finalizes the fix on this 2005 GMC 4500 with the LLY Duramax Diesel that is having some sort of issue with the FICM and the injectors and a code P1229 that we diagnosed in a previous video. Time to learn something!
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48 thoughts on “Duramax lly – ficm / injector trouble / misfire – part 2”
  1. Avataaar/Circle Created with python_avatars Ron Peterson says:

    I was a diesel Marine mechanic Now that’s a real mechanic right there not a part changer

  2. Avataaar/Circle Created with python_avatars Keith Studly says:

    Eric, you say you don't want people to think that your 'God's Gift' to broken cars yet you show how you can do amazing things like fixing this truck. Don't you think this is counter productive? You just have to stop posting vids where you are looking so incredible and people will stop with the advice calls and wasting your time! Keep up the way you have been going and your doomed to be a legend! (in MHO) Let's see more vids where you tell the owner that their car is good for nothing but junk and and show the wrecker taking it to the scrapyard at the end. That will cut down on the YouTuber calls.

  3. Avataaar/Circle Created with python_avatars John Bailey says:

    Which autel do you have and do you like it ?

  4. Avataaar/Circle Created with python_avatars Paublus Americanus AMERICANUS says:

    Let's see, couple thousand work before Eric. Eric has Immediate problem thinking 12v but not. When he finds other voltages for it to send proper injector firing finds it's the ficm, (fuel injector control voltage), feedback circuits overwhelm the Eric for a while, while scratching head. Gets to the knowledge feedback from other injectors firing on the power circuit, says, hey ficm, which all the money and fiddling never found the right faulty component. Not sure how many thousand would have been needed to find the problem. What this means to me is, someone in his area needs to be a diesel guru like Eric is a circuit guru I would trust and have trouble understanding exactly how he found this.

  5. Avataaar/Circle Created with python_avatars NICk AYIVOR says:

    KNOWLEDGEABLE South Main Auto Repair
    ErictheCarGuy was right about South Main Auto Repair
    Part 1
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    From Nick Ayivor from London England UK 🇬🇧

  6. Avataaar/Circle Created with python_avatars Antonio Claudio Michael says:

    The Jeep Hat Giving you Good Gm Vibes Eric O good video and Series As Always @SouthMainAutoRepairLLC

  7. Avataaar/Circle Created with python_avatars william t Montgomery says:

    Hopeful I never need this, But being to old do this any more we sure enjoy trying to keep up, keep up the good work,,

  8. Avataaar/Circle Created with python_avatars claymore cluepile says:

    when eric first lifted the hood showing this setup i thought it was fking shocking….engine bay totally filled with crap and plastic and no engine visible……to me it looked like an impossible job…..he puzzled his way through the first hour basically teaching himself how to do an appendectomy while performing his first appendectomy….but here we are cured up and fixed….eric is a very smart and persistent dude who likes to pretend he's a kinda sorta dummy stupid guy…..he reminds me of richard dean anderson's character on Stargaate SG-1 Colonel Jack O'Neill, who sorta plays a simpleminded guy but who knows and does everything when the chips are down…………………………this was a decent video, not my favorite by a wide margin….when this video was over i was left admiring my 1935 vintage Lister diesel 6 hp single cylinder engine where the fuel pump and everything else is entirely mechanical, no wires or modules or computers or waveforms…for 50 years all fuel pumps were based on the same Lister mechanical fuel pump and when you had a 6 cyl engine they just lined up 6 lister single cyl fuel pumps beside each other and stuck in a teeny tiny cam shaft to drive them….beautiful, simple, serviceable, accessible, foolproof….and gone with the wind

  9. Avataaar/Circle Created with python_avatars whatupdocks says:

    Great critical thinking skills,only thing missing was mrs O

  10. Avataaar/Circle Created with python_avatars James Viana says:

    Hi my friend i have truck , no pulse injectors you can help me my name is James, you can help me with diagram FICM and ECM thanks i have silverado 2002 6.6 2500 HD

  11. Avataaar/Circle Created with python_avatars Alejandro Labastida says:

    Hi amigoes it's assumed how the technology permit to learn more by the videos special if we have a good instructor like you. Thanks for your support .

  12. Avataaar/Circle Created with python_avatars v s says:

    The "baby" units , have their own (chaffing,connector problem), that said. Ty sir ,for a humble and well made diagnosis video. Battling a 04.5 myself atm lol. Wish me luck 😉

  13. Avataaar/Circle Created with python_avatars Neil Figueredo says:

    You're the best.!!!

  14. Avataaar/Circle Created with python_avatars John Hyde says:

    Thank you keep it up great help good logical trouble shooting

  15. Avataaar/Circle Created with python_avatars nonya biz says:

    Seems my channel got deleted again 2nd time on YouTube,I don’t make content so don’t ever say anything about politicians except Trump or deleted channel. To my point I had to rewatch all S.M.A content a 3rd time to thumbs up all of them so I know I watched that particular content. Well worth it. Now I use my wife’s channel. Realistically I watch S.M.A any time I’m bored no matter what video I still learn stuff.

  16. Avataaar/Circle Created with python_avatars Tom Sawyer says:

    My degree is in electronics, but not automotive electronics….however, I understood perfectly what you were describing. Good video.

  17. Avataaar/Circle Created with python_avatars Robert Threm says:

    Good notes hahaha watch your video

  18. Avataaar/Circle Created with python_avatars Wayne Habat says:

    The only concern I have with the diagnosis of the module is, WHY did the module fail? I'm always very apprehensive to replace a module unless I know why it failed. Because how do you know that the replacement one won't burn up too?

  19. Avataaar/Circle Created with python_avatars Tom Spathis says:

    9 hours $225 wow try 9 hours $990 any mechanic in Australia right now.

  20. Avataaar/Circle Created with python_avatars Derek Simenac says:

    Diesel injectors do not have a coil inside to fire, it uses piezo crystals that expand to open valve

  21. Avataaar/Circle Created with python_avatars Shane Harrison says:

    Well you and I both man I can say I know more now than I did first time

  22. Avataaar/Circle Created with python_avatars Paul Fiebke says:

    Can't belive the dealer could not fix it, what did the glow plug have to do with the problem and reprogram the computer, he got a first class ass fucking if you ask me keep up tje good work

  23. Avataaar/Circle Created with python_avatars German Dominguez says:

    Great job

  24. Avataaar/Circle Created with python_avatars Charlie Crown says:

    Top class diagnostics, as always 👍

  25. Avataaar/Circle Created with python_avatars kain0m says:

    The offset between the input and output is because you're probing the wrong input – I don't know the firing order of that engine, but you're probing the control wire for the injector firing before #3.

  26. Avataaar/Circle Created with python_avatars Joe Vreeland says:

    I was suspicious of some sort of driver module 'cause the Amps:Volts ratio wasn't gonna come from a PCM. I was thinking a quad driver or quick-switching MOSFET. I still wonder why the coil collapse is so long before the spike of 50+ VDC.
    ….and, yeah….. 50V will kick a bit ….. but it's the Amps ya gotta worry about.
    You're laid out across s lot of potential grounds and sticking a probe into places where ya shouldn't… zap!
    Then ya gotta sharpen a new point on your probe. BT-DT!
    I notice that your probe is long enuff for many re-sharpenings. Just sayin'……
    If it wasn't for nothing but your Columbus attitude (seek, and ye shall find) I 'd still watch just for entertainment value. Love ya, guy!

  27. Avataaar/Circle Created with python_avatars IBO Development says:

    Dr. O 's operated and it was a success

  28. Avataaar/Circle Created with python_avatars Jared THISDELLE says:

    👍👍👍👍😎😎😎😎

  29. Avataaar/Circle Created with python_avatars 22video11 says:

    One of these days this guy will come to you first.

  30. Avataaar/Circle Created with python_avatars Brian Beard says:

    Reman FICM is a cool grand. Factory new is 1500.

  31. Avataaar/Circle Created with python_avatars Herb Dubose says:

    Keep up the good work

  32. Avataaar/Circle Created with python_avatars Andrew Michie says:

    Classic blown capacitor

  33. Avataaar/Circle Created with python_avatars Gabriel Silva says:

    Hello, how much is your job in this work? Thank Gabriel Chile

  34. Avataaar/Circle Created with python_avatars Tom Gep says:

    Eric is now the Duramax expert ….LOL

  35. Avataaar/Circle Created with python_avatars 1FNJO says:

    FICM really Fu- -ed him

  36. Avataaar/Circle Created with python_avatars Gary Alford says:

    This reminded me why I had hated working on trucks, and that was before computers !

  37. Avataaar/Circle Created with python_avatars Daniel Hurley says:

    FICM? I dont even know him!

  38. Avataaar/Circle Created with python_avatars Billy Smith says:

    Man weird to see an increase from 12v to up to 50v increase on that injector

  39. Avataaar/Circle Created with python_avatars Stephen Liviniuk says:

    That's why you dont buy a duramax. Pain in the ass to work on. I fix all my cummins with a simple 80 buck scanner. Easy peezy.

  40. Avataaar/Circle Created with python_avatars Manuel Flores Sr. says:

    The electrical mombo jombo bored me to death. I wish I could understand it.

  41. Avataaar/Circle Created with python_avatars Carlos Moreira says:

    This ain't brain surgery…or maybe it is! Using logic…what a concept!

  42. Avataaar/Circle Created with python_avatars markam campbell says:

    did you find the coolant leak?

  43. Avataaar/Circle Created with python_avatars Paul Dionne says:

    Great Job Sherlock (Mechanic of Auto)