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  1. General Discussion
    When my truck gets to 170 degrees it has a rough idle in park or nuetral. Put it in gear and it calms back down to normal. Only at 170 degrees or more, anything under and it runs perfectly fine, it’s been doing this for a while now, I changed out the turbo , 8 new fuel injectors, and new cp3 ...
  2. 01-04.5 LB7 Duramax Powertrain
    so the truck runs and drives just fine, but at an idle it jumps up about 200 rpm every 5-10 secconds. When I pump the top of the fuel filter, no more rough idle. put a brand new filter on thinking it could be that, no changes, pulled the bleeder valve screw and it was totally destroyed so i...
  3. 01-04.5 LB7 Duramax Powertrain
    I have an 02 Duramax which is completely stock. It recently started running rough but only for a few seconds each time I let off the accelerator just about the time it gets to an idle. Then it settles down and idles just fine. When revving up or at highway speed, it is just fine. It also...
  4. 01-04.5 LB7 Duramax Powertrain
    02, LB7 160k new injectors at 130k, 1,000 miles on fuel filter. Bullydog gt, 5' turbo back. When idling in neutral, park, or drive the truck vibrates pretty severely half the time and pops and shakes when i shut it off also about 75 percent of the time. If if give it a little gas it idles...
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