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Thread: Tune C5 lsx and still die and dip in gear, park and neutral solve

  1. #1

    Tune C5 lsx and still die and dip in gear, park and neutral solve

    newet1custom os.hpt

    maf is tune
    Ve is tune
    injector data is ok, stock ls7

    c5 with lsx454
    vararam
    fast102
    90mm ls2 tb
    A4

    the thing is we finally tune the park and neutral idle and airflow
    the car was surging, dip low, die, stall, and now its perfect

    but we cant solve the in gear...
    after a burn, the car die
    die when i decel for a stop

    someone got any idea please...

  2. #2
    Senior Tuner SultanHassanMasTuning's Avatar
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    your numbers are crazy high for BRAF


    also your timing in idle region is very high
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  3. #3
    Senior Tuner mowton's Avatar
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    Quote Originally Posted by SultanHassanMasTuning View Post
    your numbers are crazy high for BRAF


    also your timing in idle region is very high
    There is no evap or any other source of air to the engine; all plugged. Idle timing set to max vacuum and dropped a couple degrees. Cam has 19 degres overlap. Issue is the TB closes to 11.373 on decel/throttle settle and stays there until you reach adaptive idle or get back into the pedal...

    Ed M
    2004 Vette Coupe, LS2, MN6, Vararam, ARH/CATs, Ti's, 4:10, Trickflow 215, 30# SVO, Vette Doctors Cam, Fast 90/90, DD McLeod, DTE Brace, Hurst shifter, Bilsteins etc. 480/430

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  4. #4
    Senior Tuner SultanHassanMasTuning's Avatar
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    a log would be nices
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  5. #5
    Senior Tuner mowton's Avatar
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    Ed M
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    2004 Vette Coupe, LS2, MN6, Vararam, ARH/CATs, Ti's, 4:10, Trickflow 215, 30# SVO, Vette Doctors Cam, Fast 90/90, DD McLeod, DTE Brace, Hurst shifter, Bilsteins etc. 480/430

    ERM Performance Tuning -- Interactive Learning ..from tuning software training to custom tunes
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  6. #6
    Senior Tuner SultanHassanMasTuning's Avatar
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    injector PW seems a little high for idle region from what i have tuned in the past LS7 injectors
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  7. #7
    Senior Tuner mowton's Avatar
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    Yes I agree and if the idle timing weren't spot on, I would say there was a combined excess of both air and fuel.....but timing seems good and where it is commanded. I for the life of me can't figure out why the Throttle blade sits at 11.373 during the entire rpm/decel drop as the idle falls below commanded and stalls. No matter what the Drive RAF is set to, its always 11.373? And the rising fuel trims at this point are also perplexing? I have looked for any Blade controllers and just can't seem to find it? Even the Follower does nothing?

    He has said something about a leak at one of the manifold ports, but I am not sure.

    Ed M
    2004 Vette Coupe, LS2, MN6, Vararam, ARH/CATs, Ti's, 4:10, Trickflow 215, 30# SVO, Vette Doctors Cam, Fast 90/90, DD McLeod, DTE Brace, Hurst shifter, Bilsteins etc. 480/430

    ERM Performance Tuning -- Interactive Learning ..from tuning software training to custom tunes
    HP Tuners Dealer- VCM Suite (free 2hr training session with purchase), credits and new Version 2.0 turtorial available
    http://www.ermperformancetuning.com
    http://www.facebook.com/ERMPerformanceTuning

    [email protected]

  8. #8
    Senior Tuner SultanHassanMasTuning's Avatar
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    try this
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