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Thread: How To Tell If Cummins ECM Has Been Tuned Before

  1. #1
    Senior Member
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    Default How To Tell If Cummins ECM Has Been Tuned Before

    I have a 2008 Dodge truck that my buddy bought from a dealer and I do not know if it has been tuned or not. How do you tell if an Cummins ECU has been tuned before?

    Regards,

    Frank
    2007 LBZ 2011 LML Silverado Pickups
    2015 GMC Denali 3500 Dually Diesel Pickup
    2007 Dodge 6.7 Pickup

  2. #2
    Lifetime Member comnrailpwr's Avatar
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    Read the tune and look at it. If the tune won't read out it's likely locked from a canned tunner for someone has put EFIlive on it. Is also likely has the anti tuning bootloader in it.

  3. #3
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    Tune reads out fine, just want to make sure I do not have a problem if it was tuned before and then returned to stock with a bully dog or some other tuner.
    2007 LBZ 2011 LML Silverado Pickups
    2015 GMC Denali 3500 Dually Diesel Pickup
    2007 Dodge 6.7 Pickup

  4. #4
    Lifetime Member comnrailpwr's Avatar
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    In v7.5 tune tool under the calibrations tab where you look at the bin and operating system it will say "do not flash" if the checksum are incomplete.

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