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  1. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Louder than the lift pump? only thing i can compare it to is it sounding like a banjo being plucked on one string and it holds that sound for about 3 seconds than gets quite. as of now we are going back over the electrical side of things with the info "DAVe3283" has just gave us.
  2. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Where is that fuel flow going if its not returning it? And an update with where we are at with the truck. I got the ok to plug the used regulator into the ecm to see what happens.We started the truck and left it ran several times with the regulator unplugged and to see if we could duplicate the...
  3. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    According to a print out(From a 6600 duramax engines theory and diagnostic handbook printed in 2006) the service manager at dealer gave me "If the fuel rail pressure is too high,the pressure control valve's pulse width modulation increases to limit the flow of supply pump fuel to the high...
  4. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Quick update. We did get the truck running last night but i was unable to leave a post i had to be at school early today. The amperage readings i posted are way off.. i was told to set the fluke to mv he didnt tell me id need to convert anything.The readings we pulled on the fluke were 400mv(i...
  5. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    I understand entirely the control the ecm has on the Fuel pressure regulator but if you read up again i have already done every test in the book 3 or more times and i have the same results every time.Fuel return and no pressure.The reason i am looking at the ecm is because i now believe the over...
  6. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    I will be putting a used fuel pressure regulator on tonight to test the theory.I will not be plugging this one in to avoid damage.
  7. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Spoke to fella at diesel performance shop and he has never herd of a fprv making the noise mine is.We spoke for a bit about the fuel pressure regulator and how it is controlled.He said "gm has a test where they want you to inspect koeo fprv duty % and if not at 20% suspect an ecm fault or wiring...
  8. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    THEFERMANATOR stated i should pull the pump return off of the pump and only a small amount should come out.I was hesitant to perform this test because i had no spec of what is good or bad. Does anyone know what an ok amount should be.3 seconds of cranking got me 30ml of fuel is this good or bad...
  9. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    As stated earlier i have great fuel up to the inlet side of the pump,and with the rail supply off i have just a trickle.I haven't tried the pump return because i was unable to find a spec for what is good and what is bad.I have tried it now after reading the last post and with the fuel pressure...
  10. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    I thought that also and pulled the hose off of the back of the drivers side rail and plugged the hose i removed.I installed a new hose on the rail and ran it into a container and its dry as a bone.I got this test from a place called kennedy diesel i assume there test is legit enough to trust.
  11. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    I have re-installed everything and put the truck back to the way it should be and started fresh doing all of the test my self.. no more buddies. Pulled up the harness and got a clear view of the top of engine and i am 100% certain that the fuel pump is correctly hooked up.I was able to...
  12. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Has anyone ever had ecm failure create these symptoms.Is low fuel pressure regulator duty cycle enough to keep it from starting?Has anyone ever had bad bosch cp3 or regulator? im really at a loss with this truck. Great fuel up to back of new cp3 and no start.Another quick question can anyone...
  13. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    we have taken off the drivers side fuel rail supply line and and cranked the truck and fuel just trickles out....before we replace the ecm i will recheck all of my fuel lines from the filter to the cp3
  14. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    i wish it was but it is only 34-71 psi during cranking and with key on engine off. Im starting to think ecm fault of some kind im at a loss.
  15. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Nope all supply and return lines are in good shape. Local dealer service manager said i could eliminate all supply issues by putting fuel pickup in container filled with fuel but truck still didnt start.
  16. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Pick up pump does run with key on and is pushing fuel up to injection pump.
  17. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Yes installed new fuel filter. And during cranking fuel pressure has no change
  18. 0

    Dmax Guru Needed EMERGENCY HELP!!!(Master dmax techs or pros please)

    Long story short im borrowing my brother in laws 2006 3500 2dr lbz dmax. while he is away on his honeymoon. I MUST GET THIS TRUCK RUNNING Yesterday. Truck threw P0087 after pulling small hill but ran great. Local garage said to try a fuel rail pressure sensor.We Installed a brand new AcDelco...
  19. 0

    MAJOR Torsion Bar HELP!!!

    Location Airovers The Truck and i are located in the Washington state area. And Im pretty Sure These Shocks Are shot im not 100% sure yet i havnt done much with the truck im still working on gathering my crash parts for the bed and rear.
  20. 0

    Jerry Rigd PULL Buggy????????

    Hey Fellers, Im new to the duramax forum as i just bought a project truck. Ive got a 2007 3500hd i bought wrecked. My Major Problem is that this truck came slightly modifed.The mods im having most trouble with are the front torsion bars.Firstly they are much smaller than my dads 2500hd. his bar...
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