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Thread: Confused with my tuning efforts in SD mode

  1. #1
    Tuner in Training
    Join Date
    Aug 2009
    Posts
    27

    Confused with my tuning efforts in SD mode

    I finally got around to starting my SD tune ad my first impression so far is that driving off the VE tables is so much better than, drivability wise, what i was seeing with the MAF. However, I'm running into two weird issues.

    First issue: I've done two runs so far and Ive done the Multiply by % each time but the error between the first and second log run was even larger. Ive posted the run files below if that helps.

    Second Issue: When i make changes to the tune after doing a log run, the car wont run. It'll turn over, start and then immediately shut down. I've found, however, that if i load the old MAF tune, start the car and THEN load the new SD tune the car will start up with no issues.

    Any thoughts?sd1.hplsd2.hpl
    Last edited by theone61636; 08-18-2020 at 11:52 PM.

  2. #2
    Advanced Tuner
    Join Date
    Oct 2004
    Location
    Huntingtown, MD
    Posts
    200
    Post the two tunes.
    Phil K.
    02 Camaro SS 5.7L LS1
    01 Silverado 1500HD 6.0L LQ4 4L80E 78/75 turbo with Flex Fuel