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Thread: C7Z throttle not opening all the way

  1. #1
    Tuner in Training
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    May 2018
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    C7Z throttle not opening all the way

    Here is log from just now. only seeing low 80% throttle position. any idea why or how i fix this?
    2017 z06
    15% pulley
    intake
    cat delete
    x pipe
    Attached Files Attached Files

  2. #2
    Tuner in Training
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    May 2018
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    maybe it is, different set of config channels.
    throttle position sae 84%
    throttle position 99%
    pedal position 99%
    Attached Files Attached Files

  3. #3
    Tuner in Training
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    May 2018
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    also looks like im getting 7-8* of timing pulled out. so it appears it pulls based on manifold temp, not inlet temp

  4. #4
    Tuner in Training
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    May 2018
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    bump

  5. #5
    Senior Tuner Higgs Boson's Avatar
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    Mar 2010
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    Texas Hill Country
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    3,299
    if your torque model is wrong it will close throttle and retard spark to help output match up with expected power.

    Driver Demand
    Virtual Torque Editor helps you edit your torque model coefficients
    Peak Torque

    are your main areas to recalibrate.

  6. #6
    Advanced Tuner veee8's Avatar
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    Apr 2006
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    Raleigh, NC
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    You are correct in your findings. The throttle is indeed all the way open. The approximate 84% is WOT.
    Also on the LT4 cars the manifold air temp is what is referenced for the inlet air temp multiplier.
    www.crawford-racing.com
    Home of the original and best selling CR-Fueler plug and play port injection controller kits for all GM Gen V direct injection platforms.