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Thread: Tune issue on Duramax LMM truck

  1. #11
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    Apr 2007
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    Glad it worked out for you-----When the LMM's 1st came out I had the 1st 4 tunes come back with white smoke--no power--sputtering--I tried like heck to figure it out and at the time beacuse they were so new--no one really knew much about how to tune them properly and work around the DPF filter-
    The biggest problem was not having a LMM of my own to work with--So I finally called one of the LMM guys that had the issue and offered him $100 to borrow his truck for a day and use it as a ginney (?) pig--and promised to return it back to stock when done---I strarted by changing one table at a time -starting with the most important stuff 1st--and worked my way down--When I got to the EGR parameters it started to smoke/sputter---Yea !!! so from then on i just leave them be on the LMM's--- ( my favorite Duramax is the LBZ ) responds well to tuning--no problems--no codes--shifts well--learns fast--some guys around here in 2007-8 were ordering NEW trucks and paying extra for the LBZ rather than the LMM---

  2. #12
    Lifetime Member
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    Jan 2006
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    387

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    Whats the story with the EGR, I've been tuning mine out without the use of a blocker plate since day one and have not had any issue's yet. Do some LMM's have a certain parameter they don't like in the egr section?
    04 LB7
    2010 LMM
    2015 LML

  3. #13
    Senior Member
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    May 2009
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    could someone please provide what year and OS they are having issues with the egr on. i have tuned several LMM's all OS 8594 and '08 '09 without any issues disabling EGR

  4. #14
    Junior Member
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    Apr 2009
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    16

    Default The smoke is back

    So I have an issue with the white smoke again. It's not blowing massive amounts of white smoke like my previous issue.
    I have added mpi twins, 40 over injectors, and removed the egr. With my new tune the truck feels strong but the longer I drive the truck the more white smoke I see! It's fracking with me.
    Should I tweak the egr values or the maf table?
    Is it something with the injectors? Did I get some fuel in the oil?
    I can run it at idle and hammer the throttle and see black smoke. I put it in drive and drive half a mile and the white smoke appears.
    The worst part is I developed some pop pop pop air leak on a test ride so we are back to square one on the work.
    the air leak timing increases as throttle is increased.
    Chuck Bondurant
    Duramax LMM
    EFI Live tuned -Idaho Rob
    ATS transmission
    Bully Dog - PMT gauges only
    MPI Twins
    40 Over injectors
    FASS Fuel System
    Fabtech 6" - 18" XD Addict Rims

  5. #15
    Lifetime Member killerbee's Avatar
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    Jan 2006
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    Damn, and I just packed away the lawn darts.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

  6. #16
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    Apr 2009
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    A simple 12 gauge with 6oz shot will give you a better chance.
    Chuck Bondurant
    Duramax LMM
    EFI Live tuned -Idaho Rob
    ATS transmission
    Bully Dog - PMT gauges only
    MPI Twins
    40 Over injectors
    FASS Fuel System
    Fabtech 6" - 18" XD Addict Rims

  7. #17
    Lifetime Member killerbee's Avatar
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    Jan 2006
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    1,079

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    If you posted a log (yes, you have to work) your problem would have been resolved long ago.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

  8. #18
    Junior Member
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    Apr 2009
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    This is a new issue im having and i do have some logs. i dont see any major issues but will be happy to post logs when i get back home.
    Chuck Bondurant
    Duramax LMM
    EFI Live tuned -Idaho Rob
    ATS transmission
    Bully Dog - PMT gauges only
    MPI Twins
    40 Over injectors
    FASS Fuel System
    Fabtech 6" - 18" XD Addict Rims

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