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Thread: idle help

  1. #1
    Potential Tuner
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    Apr 2021
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    idle help

    l99 but deleted vvt,afm,dod running on 91 with meth. installed btr stage2 turbo cam,runs flawless above 1400rpm but cannot get it to idle properly.replaced all vac lines no leaks but will only get to like 80kpa at idle so no brakes and REAL choppy attaching the tune from after the dyno just looking for any help with the idle, and no i did not tune but trying to fix so i dont have to deal with them anymore.can get a log if needed but spark bounces from like 9-20 in park and drive with brake on
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  2. #2
    Senior Tuner Ben Charles's Avatar
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    Aug 2009
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    That cam shouldn’t idle at 80kpa at a reasonable RPM

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    96 TA Blown/Stroked, 4L80E/Fab 9
    15 C7 A8 H/C 2.3 Blower/PI
    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  3. #3
    Potential Tuner
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    Apr 2021
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    900rpm and it doesnt just lopes like a barking dog

  4. #4
    Senior Tuner Ben Charles's Avatar
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    Vac leak or something is off... at 900rpms that KPA should be much lower

    Email Tunes, [email protected]
    96 TA Blown/Stroked, 4L80E/Fab 9
    15 C7 A8 H/C 2.3 Blower/PI
    14 Gen 5 Viper
    Custom Mid Engine chassis, AKA GalBen C

  5. #5
    Tuner
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    Sep 2008
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    Raise your base idle spark(20*minimum) tables in the areas your base idle rpm is. Lower the overspeed/underspeed spark tables by 1/2. Also your startup P/N, and InGear rpms, are at 525 rpms, in the higher temperature areas, make them match your base rpm table.