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Recent content by Rockabillyrat

  1. Rockabillyrat

    LB7 new injectors but bellows white smoke during warm up

    Sounds like a classic LB7 injector issue. I've had ALOT of issues with aftermarket remain injectors on customers trucks. So now if I'm replacing them with stock injectors the only ones I will install are Bosch.
  2. Rockabillyrat

    Why I DIY

    Mevotech (got it right this time🤣) I believe is made is Canada. We use the TTX series with good results. MOOG was bought out by federal mogul years ago and has turned into a white box special with a Moog sticker. The problem solver series is still Moog parts but they are not same so we...
  3. Rockabillyrat

    Why I DIY

    These trucks are hard to get the alignment dead on sometimes. Alot of times I have to set the caster out of spec on the right side to get rid of a pull to the right. Which is ok because caster dosent cause tire wear issues like camber or toe. Its really hard to get that set correctly at home...
  4. Rockabillyrat

    Calling all pro obd1 tuner experts... I found something interesting!

    Cool info. I've never played around with OBD1 tuning, but I've done alot of OBD2 diesel stuff. Can you post a snap shot of the timing table? id like to see what that looks like for research purposes.
  5. Rockabillyrat

    No start,700psi

    This is where i got mine. https://www.ebay.com/itm/221981170071
  6. Rockabillyrat

    No start,700psi

    Where did you get your parts at? I've had issues with certain companies in the past. Especially with LB7 injectors. Now I only install Bosch parts unless a customer brings his own. Since everything is new I would double check your supply system for air. When you open the bleeder and pump the...
  7. Rockabillyrat

    No start,700psi

    Did you put replace the CP3 and relief valve in to try and fix the low rail pressure Issue? Or did it happen after you replaced them? Check your supply side for air. Duramax doesn't use a lift pump and are prone to air in the fuel system. Secondly injectors with a high return rate can cause a...
  8. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    I brought that up because you stated that GP are ONLY supposed to operate at battery voltage. But AGAIN that's not 100% correct. For one the factory GP are 6v and are powered with 12v to heat them faster. From the factory they are doubling the voltage to the GP. regular GP cycles with a battery...
  9. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    If unplugging a sensor is helping it start and run then maybe we should focus on there. That could be your whole issue and be the cause of the 57 code you posted. One more question does is smoke white white cranking? If so then that could be a GP or IP issue. You said in your original post if...
  10. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    Sounds like you may have found your problem! I'm seeing more and more PCM issues on 90s trucks. I've gotten in the habit of opening them up if I have a weird problem I can't narrow down. Especially the Fords, the capacitors leak over time and cause alot of weird issues.
  11. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    There is no sensor in the GP relay to the PCM. Only the control wire that the PCM grounds to control the relay. Does ECT read correctly on the scanner
  12. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    Husker's comment on GP isn't 100% correct. High voltage for too long will fry them. BUT, under very cold starts GP will post cycle after the engine is running. The short cycle at 14v doesn't hurt them.
  13. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    Ok I reread this thread and here is my 2 cents. (I missed you posted codes) For the battery draw you need to do an amp draw test. disconnect the negative battery terminal and hook your amp meter up in series. One lead on the battery and one lead on the negative cable end. You must disconnect...
  14. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    Wow, calm the **** down dude! First of all im not a flat rate technician. Im the lead diagnostic tech at my work and im paid salary. I take extreme pride in my work and go out of my way to save my customers money because their repair bill has no impact on my paycheck. Secondly I never told...
  15. Rockabillyrat

    6.5 Chevy Cheyenne 3500 Stalling and No-start

    One more thing, why are you telling the guy to just test his GP for a short cycling issue.... The control module determines the amount of GP time based on the temperature sensors. Probably be a good idea to scan it and see what temperature the PCM is seeing aswell.
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