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    LB7: crank no start lb7 headache

    Do you happen to know of any way to test the cp3 itself? I definitely have a high fuel return value at the cp3 but I haven't been successful in trying to find a way to test the fuel pressure regulator on the cp3. not sure if the FPR defaults to straight return if faulty or not.
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    LB7: crank no start lb7 headache

    The main thing that has me worried here is the parts the owner got for this (i.e. the injectors and cp3) were borg warner remans from oreillys. had issues with them before on 6.0 and 6.4 powerchokes but not sure how they are in duramaxes
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    LB7: crank no start lb7 headache

    Bled all air out at the test port and then went back and forth pumping and cranking about 8 times. No change in rail pressure while doing so. All fuses and relays seem to be normal, all injectors are receiving their 4 ml command while cranking. These parts were all replaced due to an injector...
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    LB7: crank no start lb7 headache

    its an 04 duramax. to start, heres a list of what all has been replaced... -fuel filter housing -cp3 -suction side fuel lines -injectors -injector supply tubes -FRP sensor currently getting 2 mpa at crank (fluctuated between 1 and 2). can hand prime at housing up to 10 psi (using test...
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