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Thread: TQ based decel spark limit when car is accelerating

  1. #1

    TQ based decel spark limit when car is accelerating

    i have one supercharged car, all runs good except this. This happend after i installed 67mm VMP throttle body.
    When car is in part boost at low throttle position, i'm getting spark source torque control and torque source is TQ based decel.
    That's totally strange and have no idea now for it. May be that's again speed density as when i have strange spark tq limits it ends in speed density...

    tq based decel.png
    Last edited by caniggia; 05-28-2017 at 06:05 PM.
    Eastern and Central Europe American Muscle and Harley-Davidson tuning
    www.hd-customs.pl
    http://www.facebook.com/hdcustomspl

  2. #2
    Advanced Tuner
    Join Date
    Jan 2015
    Posts
    565
    Having the same issue, did you find a fix?

  3. #3
    All this strange limits were coming from speed density

  4. #4
    Quote Originally Posted by caniggia View Post
    All this strange limits were coming from speed density
    I am having the same issue with my 2017 Raptor.
    So, have you figured it out?

  5. #5
    Return all speed density to stock and see if issue gone.
    Eastern and Central Europe American Muscle and Harley-Davidson tuning
    www.hd-customs.pl
    http://www.facebook.com/hdcustomspl

  6. #6
    Quote Originally Posted by caniggia View Post
    Return all speed density to stock and see if issue gone.
    They have never been touched.

  7. #7
    Tuner in Training
    Join Date
    Nov 2017
    Posts
    14
    Having the same issue. Anyone figure this out?

  8. #8
    Advanced Tuner
    Join Date
    Feb 2017
    Location
    TX
    Posts
    761
    Have any of you tried re-populating torque/inverse tables? Your engine brake torque is much higher than scheduled torque which has your desired load 30% less than what you're creating. Log all your torque channels, torque request, scheduled and so on.

    What throttle body data are you using?