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Thread: LML vane position at idle

  1. #1
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    Default LML vane position at idle

    Is there any way that anyone has found to get the vanes to stay open at idle on the LML? since there is no min and max table has anyone found another way to get it to stay open? Very strange that it will open right up in reverse at idle but not in forward gears. and if you bring the rpm up 50 off idle with the pedal in neutral it will open them up also. So i though well bump the idle up 50 rpm. no luck still closes them off.
    2015 3500HD crew cab long bed, 6" fabtech, slightly tuned, emissions intact.
    2005 dmax ccsb, EFI live tuned DSP 5 Full built motor, S471 billet single, More better built trans this time. and lots of other things.
    1984 CJ7 powered by a 2000 LS1. 4L60E.
    2012 Jetta TDI 6 speed manual, (yes the dirty the bastard haha)
    2003 Jetta TDI,
    1986 K10 LQ4/4L80E

  2. #2
    Lifetime Member GMC-2002-Dmax's Avatar
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    2012 OS by any chance ??

    www.mscservices.net


    Tuner of many, many Duramax and Cummins Diesels.


  3. #3
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    Nope 11'
    2015 3500HD crew cab long bed, 6" fabtech, slightly tuned, emissions intact.
    2005 dmax ccsb, EFI live tuned DSP 5 Full built motor, S471 billet single, More better built trans this time. and lots of other things.
    1984 CJ7 powered by a 2000 LS1. 4L60E.
    2012 Jetta TDI 6 speed manual, (yes the dirty the bastard haha)
    2003 Jetta TDI,
    1986 K10 LQ4/4L80E

  4. #4
    Lifetime Member GMC-2002-Dmax's Avatar
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    Its possible to have them open on all 2011-2015 OS.

    You have to get the right combination to get the vanes to stay open at idle.

    The 2012 will every once in a while do that to me, but that is the only OS I have found to randomly do that.
    www.mscservices.net


    Tuner of many, many Duramax and Cummins Diesels.


  5. #5
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    The right combination of switches? is that what your saying?
    2015 3500HD crew cab long bed, 6" fabtech, slightly tuned, emissions intact.
    2005 dmax ccsb, EFI live tuned DSP 5 Full built motor, S471 billet single, More better built trans this time. and lots of other things.
    1984 CJ7 powered by a 2000 LS1. 4L60E.
    2012 Jetta TDI 6 speed manual, (yes the dirty the bastard haha)
    2003 Jetta TDI,
    1986 K10 LQ4/4L80E

  6. #6
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    What is the OS # of the 12' that will do that? I wonder if thats possible that is has a 12' OS in it?
    2015 3500HD crew cab long bed, 6" fabtech, slightly tuned, emissions intact.
    2005 dmax ccsb, EFI live tuned DSP 5 Full built motor, S471 billet single, More better built trans this time. and lots of other things.
    1984 CJ7 powered by a 2000 LS1. 4L60E.
    2012 Jetta TDI 6 speed manual, (yes the dirty the bastard haha)
    2003 Jetta TDI,
    1986 K10 LQ4/4L80E

  7. #7
    Lifetime Member Chavez91's Avatar
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    My '11 will randomly do that to me too. But seems that after a few hundred miles on the tune after a reflash, it will always go to a rumble and sometimes it will rumble right off the bat. She has a personality... haha

    And its the right combination of "everything". These LML's are finicky.
    Josh

    '04 GMC LLY
    - L5P, Motech, 6-Spd Conv. ML Trans.
    '05 GMC LLY - 250%, 12mm, 67mm Custom Turbo, 6-Spd Conv. ML Trans
    '19 3500 RAM - Tuned Aisin 0_o

  8. #8
    Lifetime Member DURAtotheMAX's Avatar
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    Ive found its really random too....I finally figured it out to the point where it rumbles maybe 80% of the time. Then I ran out of time to mess with it, and the guy isnt local to me. Next time I get access to the truck Ill mess around with it again.

    Ben
    2005 Silverado, CC/SB, 4x4, LT, LILLY/Allison
    12.9s @ 108 mph

    many thanks to Ross and Paul

  9. #9
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    OK thanks I'll get back on it. I bought an LML so I could get tunes developed for it lol so I have plenty of time to figure it out.
    2015 3500HD crew cab long bed, 6" fabtech, slightly tuned, emissions intact.
    2005 dmax ccsb, EFI live tuned DSP 5 Full built motor, S471 billet single, More better built trans this time. and lots of other things.
    1984 CJ7 powered by a 2000 LS1. 4L60E.
    2012 Jetta TDI 6 speed manual, (yes the dirty the bastard haha)
    2003 Jetta TDI,
    1986 K10 LQ4/4L80E

  10. #10
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    yeah doesn't seem to be an easy way to do anything on these trucks lol I've experienced similar issues with vane pos but haven't had time to mess around till it was perfect

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