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  1. W

    Truck surging at idle after installing new FPR

    Mine is not fixed as of yet, I bought an Air Dog and have not installed it yet. I don't drive the truck but once or twice a week and don't ever think about it till get in it.
  2. W

    Truck surging at idle after installing new FPR

    We have replaced all the fuel lines unless there's one that we have missed.
  3. W

    Truck surging at idle after installing new FPR

    Ok, update! Today I installed a 5.5-9 psi fuel pump to try and see if it takes away the loping, and it did! Hooked it up to the inlet of the fuel filter housing and turned it on and started the truck and no loping. I then put it back to factory and the loping came back. Any ideas to why this is...
  4. W

    Truck surging at idle after installing new FPR

    Ok update.... Went to friends shop and on the way there the truck surged at every red light and stop sign until the last red light then truck starts to run just fine. He put his Autel MaxiSYS pro on it and ran the truck through its paces, fuel rail pressures are spot on, FRP is spot on...
  5. W

    Truck surging at idle after installing new FPR

    Will do!
  6. W

    Truck surging at idle after installing new FPR

    Rail pressures are right in line with what they are calling for, actually for the most part exactly dead on, it has us scratching our heads. I am bringing to another friends shop this afternoon for him to run some tests and monitor it on his computer to see if we are seeing the same. Thanks for...
  7. W

    Truck surging at idle after installing new FPR

    Injectors have only 50k on them. Will try previous post and will report back.
  8. W

    Truck surging at idle after installing new FPR

    You think an air dog kit would work? We are going to try to run straight off of a bucket bypassing fuel filter and everything down stream to see if the problem is stops.
  9. W

    Truck surging at idle after installing new FPR

    I have recently bought an 03 3500 dually from a very good friend that has lots of experience with diesels. The truck started surging at idle and is real bad when in gear only while stopped, but it runs great as soon as your on the throttle. We have replaced the FPR twice with no change, while...
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