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  1. B

    Duramax lmm problems. Help please!

    I did already install the ppe shim kit.
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    Duramax lmm problems. Help please!

    Oh I forgot to say that I didn't see much black smoke this time unless it was 3/4 throttle or more.
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    Duramax lmm problems. Help please!

    I figured that the noisy injectors to quiet to noisy to quiet might be air getting in the fuel lines. Maybe air bubble are building up and then sucking through the injectors. That would explain random surges and noisy injectors to random quiet injectors I would think. So I went through and...
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    Duramax lmm problems. Help please!

    Idk. They just told me it was 1200 foot pounds of torque. And I looked up what average tune has that much torque and it was 600/1200.
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    Duramax lmm problems. Help please!

    The low fuel rail pressure problem is still there. It take much longer of a hard ride to make it happen. So the collapsing fuel line fix helped. I also took my truck to the dealership to be tested for $75. They said it has 1200lb pounds of torque and a hp of 600. So it must have a big tune on...
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    Duramax lmm problems. Help please!

    I put diesel kleen in it over and over and the injectors got quiet. The low fuel rail and limp mode problem was collapsing fuel lines. So I bought 4 feet of 100r16 hydraulic hose and replaced all rubber lines. Two hoses at the fuel filter, 1 hose by the transmission, and one hose by the brake...
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    Duramax lmm problems. Help please!

    I've got a stock lmm 2008 crew cab 4x4 duramax 273k miles on it that is showing low fuel rail pressure and also lots of black smoke when you get on it and I figured a lift pump might help the cp3 pump easier making the fuel rail pressure better since it has the mileage on it. I was going to...
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