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Thread: Vortech Supercharger 5.3 hanging idle

  1. #1

    Vortech Supercharger 5.3 hanging idle

    Need help with my idle tuning on my supercharged 5.3. When In park I can rev it up and it comes down extremely slow. Ive made adjustments to the throttle follower settings and throttle cracker with no success. Would like a little input from someone else
    Last edited by Lsx_Power-parts; 08-15-2020 at 10:31 PM.

  2. #2
    Advanced Tuner
    Join Date
    Jun 2015
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    throttle cracker is just for when your moving it can add more air. You should post up a tune and a log of it. And log different idle paramaters so we can see what is going on with it. Before I mess with any throttle follower or anything, I would it up to idle and in park then adjust the throttle blade if it is cable driven so that the iac is just barely open then, get your braf dialed in in park and in gear. then you can start messing with other things. VE and spark tables will change stuff also if those are off.

  3. #3
    Advanced Tuner
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    Oct 2004
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    Did you zero any torque tables? I zeroed either Spark retard vs torque reduction or Torque loss %vs spark retard (can't remember which) and idle rpm's would hang.
    Phil K.
    02 Camaro SS 5.7L LS1
    01 Silverado 1500HD 6.0L LQ4 4L80E 78/75 turbo with Flex Fuel

  4. #4
    Potential Tuner
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    Feb 2020
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    you mind posting your tune

  5. #5
    Senior Tuner Ben Charles's Avatar
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    Throttle follower... look into it

    Email Tunes, [email protected]
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