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Thread: LMM rail pressure

  1. #1
    Member
    Join Date
    Apr 2006
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    53

    Default LMM rail pressure

    I am unable to raise the desired rail pressure on my LMM. I have changed all the tables that are associated. I have also tried changing the rail pressure at idle with no luck....... Could you guys please look into these issues,

  2. #2
    Member
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    Apr 2006
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    53

    Default

    #@#$$@ help please!!!!! $^&@!*#(

  3. #3
    Lifetime Member
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    Jan 2006
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    376

    Default

    If it's your own tune not a"purchased" tune post it and some logs and I'm sure people with help.
    04 LB7
    2010 LMM
    2015 LML

  4. #4
    Lifetime Member
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    Feb 2007
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    517

    Default

    What OS?

  5. #5
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    Join Date
    Apr 2006
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    53

    Default

    8594 OS. It doesn't seem to matter what I change, desired rail pressure in the tune WILL NOT match the desired rail pressure on the scan tool if it is different value than the tune came from the factory with. I can load a tune with every rail pressure table set to 180MPA across the board, and fire the truck up check it with the scan tool and it's still 30MPA desired. Same goes for WOT, 180MPA is MAX. I've checked over every parameter/limiter and it just cannot be raised.

  6. #6
    New Member
    Join Date
    Nov 2012
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    Default

    I have the same problem with my 08 LMM. It is the 8594 OS as well.

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