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Thread: E38 OS12658778 Keep pulling timing

  1. #1
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    Default E38 OS12658778 Keep pulling timing

    I had this car that keep pulling timing no matter what , it won't go over 13 degree @ wot , I never seen such a thing .

    It happens when I turn off the whole tq management or change any parameter regarding the timing .

    With the stock tune it goes 18-22 degree @wot easily .

    I have attached stock and tuned file .

    Thanks

    tuned.ctz

    stock.ctz

  2. #2
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    Is this a Chevy SS sedan?
    00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E

  3. #3
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    Quote Originally Posted by LastCall View Post
    Is this a Chevy SS sedan?
    Yes

  4. #4
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    Default E38 OS12658778 Keep pulling timing

    Quote Originally Posted by Eng.LSX View Post
    Yes
    I had the exact problem on a 2016 SS sedan today. Timing was a bit higher at 16, but it would not go up no matter what I did.

    I think there is an undefined table (max timing maybe?) or torque management pulling timing. Even happened with the stock tune. Should have logged the TM PIDs.
    Last edited by LastCall; January 19th, 2018 at 12:27 PM.
    00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E

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    Quote Originally Posted by LastCall View Post
    I had the exact problem on a 2016 SS sedan today. Timing was a bit higher at 16, but it would not go up no matter what I did.

    I think there is an undefined table (max timing maybe?) or torque management pulling timing. Even happened with the stock tune. Never seen anything like this before.
    I think the file gets corrupted with changed parameters but it's definitely the tq management that is pulling , I will get the last update and try again .

  6. #6
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    Default E38 OS12658778 Keep pulling timing

    Quote Originally Posted by Eng.LSX View Post
    I think the file gets corrupted with changed parameters but it's definitely the tq management that is pulling , I will get the last update and try again .
    When I flashed the stock tune in, the timing was nearly the same. I should have logged the TM PIDs. Did you log any of them by chance?
    00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E

  7. #7
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    Any luck?
    00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E

  8. #8
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    Quote Originally Posted by LastCall View Post
    When I flashed the stock tune in, the timing was nearly the same. I should have logged the TM PIDs. Did you log any of them by chance?
    Unfortunately , I didn't log TM but in my case the stock tune made more timing .

    Quick update : turned the cat protection on and added 2 degrees to the whole timing table and it worked , otherwise if I change any other table in the timing it pulls .

  9. #9
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    Quote Originally Posted by Eng.LSX View Post
    Unfortunately , I didn't log TM but in my case the stock tune made more timing .

    Quick update : turned the cat protection on and added 2 degrees to the whole timing table and it worked , otherwise if I change any other table in the timing it pulls .
    Interesting.. do you mind posting the tune where you were able to add in the 2 degrees? Did you turn on the cat protection just to see if that affected anything or...?
    00 Silverado Z71, LQ9 w/ LS3 heads, BTR cam, Whipple 2.9@8#, 4l80E

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