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  1. August 21st, 2019 #1
    gpr
    gpr is offline
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    Default LMM Fuel Rail Pressure

    Got a new to me 2009 LMM. I wanted to check the health of things so I logged the 8 injector balance rates, along with fuel rail pressure actual versus desired. Problem I'm having is the Fuel rail actual pressure is constantly reading around 18,500psi all the time. At idle or WOT it is the same. Am I logging the wrong pid?

    The other question is I logged the TP%, however it is always at 50%. why? am I logging the wrong PID? what should I be watching to know how much throttle is being given?

    Attached is my tune and log file.

    BTW, is this the correct stock tune file for a 2009 LMM Duramax?
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