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1-20 of 24 Results
  1. 11-16 LML Duramax Powertrain
    I have a problem that has gotten progressively worse over the past few weeks. I want to start this off by saying there is no check engine lights nor have I had any. The truck also has 99k miles. What started off as every so often I would notice a loss of power followed by a slight stutter then...
  2. 07.5-10 LMM Duramax Powertrain
    So I ordered a full set of Bosch factory "new" injectors, not rebuilt. When they came they were wrapped in bubble wrap with Injectorsdirect.com tape on them. No Bosch packaging at all. It just seems odd that they wouldn't be in Bosch packaging. Is there any way you would visually be able to tell...
  3. General Discussion
    I just bought a 13 lml. 155,000 miles. Test drove it all sounded great. After about 300 miles I started hearing a knock, hooked computer up and cylinder 6 balance rate was at -4.2. Changed injector same problem. The noise only comes when the truck it warm or up to temp. I can unplug injector...
  4. General Discussion
    2011 GMC Duramax 2500. I have been getting the engine power reduced message a lot. After driving normal on the interstate or highway, when I pull up to a stop light, the engine power reduced flashes. It does it about any time I slow down after driving, even while hooking trailers and loading...
  5. General Discussion
    Last few months at idle I would have an occasional single hiccup at idle. After a small road trip this past week it sometimes does the hiccup or it goes into a full loping idle with puffs of white smoke. I have a balance rate between +7-11 on cylinder 3 in park when it does the lope. I’ve...
  6. General Discussion
    Ok, so I’ve got a 03 LB7 duramax, with 402,000 miles. it has a kinda rough idle, like it’s missing on a cylinder, with a constant power surge. when you give it some gas, either in park, or going down the road, it clears up and runs great, but it black smokes like crazy. I’m talking about cars...
  7. How To's, DIY and Write ups
    Hey guys, I have a 2014 GMC 2500 with the LML and had the infamous CP4 failure the other day at 118k. Im currently pulling the injectors and got 1-7 done but I'm having a total brain block on how to get the 8th injector high pressure line off the fuel rail without pulling the turbo. I cant get a...
  8. 04.5-05 LLY Duramax Powertrain
    My truck has been leaking coolant and started knocking td I think it could be the injectors but I have no clue
  9. 01-04.5 LB7 Duramax Powertrain
    My truck (2002 LB7 Engine) has been smoking white since I purchased it. It doesn't have a hard start at any temperature, and it doesn't smoke until the engine reaches ~125F. At Idle it will smoke just enough to piss off the guy behind me, and accelerating from 0 it will smoke enough to leave a...
  10. Gauges, Electronics and Wiring.
    Having issues with fuel injectors on a LLY. Have replaced the wiring harnesses,had the FICM rebuilt and the balance rates are in tolerance. Still get fuel injector codes.
  11. 01-04.5 LB7 Duramax Powertrain
    Hello everyone. I know this has been discussed many times, but I can't find my specific issue. Truck is a 03 LB7 with 260k on it. I do the fuel filter religiously every oil change because of these pesky injectors. I have also had to replace the passenger side bank of injectors in the last 10k...
  12. General Discussion
    So I just replaced all 8 injectors all with new cups new high pressure lines new return line bolts. I cleaned the return lines really well. Still feel like I have some fuel in my oil and it’s smoking white after I accelerate. It’s black smoke and then white. I really need help here. Any help is...
  13. 01-04.5 LB7 Duramax Powertrain
    My 03 lb7 has about 15,000 miles since I replaced the injectors and recently has developed a light fuel knock on both driver and passenger side during acceleration. No hazing. Hardly any black smoke on heavy acel. It’s not incredibly noisy but I can hear them. I’ve been running a good amount of...
  14. General Discussion
    I am a recent owner of an 04 2500. I quickly found out about the dreaded d-max injector problem. I checked back with the dealer that I bought it from for warrenty info and was told about the 7 year 200000 mile warrant. But as my luck goes, the seven years expired before I bought it. 150,000...
  15. 06-07 LBZ & LLY Duramax Powertrain
    Anyone have an idea where I can purchase the electrical connector seal for our injectors? I'd rather not pony up another 65.00 for an "Connector Repair Kit".
  16. 04.5-05 LLY Duramax Powertrain
    first off truck is an 05 lly with 97000 miles, edge juice w/attitude 4"mbrp exhaust and lbz turbo mp. Other than that its pretty much stock i did head gaskets on it about 15000 miles ago and havent had any issues up until now. The problem happened about two weeks ago on my way to work in north...
  17. 06-07 LBZ & LLY Duramax Powertrain
    :help:confused: Hey all, I just entered the weird zone yesterday. I changed the oil, every thing was fine, no problems before this. Just after the oil pressure came up, it started running crappy. Figured out it had gone into limp home mode. I replaced injector #4 about a month ago. Showing...
  18. 04.5-05 LLY Duramax Powertrain
    Well, I finally tracked down WHERE the fuel leak I was smelling in the cab was at... Sort of. It appears to be around injector #4. It doesn't happen until I take the truck out on the road. Clean engine going out, covered with fuel when I get back. I replaced the return line, no help. I...
  19. 01-04.5 LB7 Duramax Powertrain
    sss sss
  20. 06-07 LBZ & LLY Duramax Powertrain
    Just paid over $1000 to have a new injector installed. Now dealership says they found metal shavings in fuel. They want $3000 to replace IP. Sound right anyone. BTW just called another dealership they will do IP for $2300....already $700 difference. :help 2006 Duramax 229,000 4x4 3500 Flatbed
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