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Thread: Throttle body not responding

  1. #1
    Tuner in Training
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    Throttle body not responding

    GM 3.6 lfx swap into a miata. Engine from a 2014 Camaro. ECM and pedal assembly from a different 2014 Camaro. ECM doner was an auto. Currently bolted to a manual. The pedal position shows a range of zero to 99.6%. The TPS shows 29% at zero pedal position and will climb to 40% and stop as the pedal position continues to increase. The car drives almost as if it's in limp mode. No DTCs show up. Ideas?

  2. #2
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    https://www.youtube.com/watch?v=ewQS...ature=youtu.be

    In this instance tps started at 27 and went to 44, but same basic problem. 44 is the biggest number I've seen.

  3. #3
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    would comparing to a LGZ tune help?

  4. #4
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    You are seeing torque limiting See

    https://www.hptuners.com/help/vcm_ed...vanced_e78.htm

  5. #5
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    Quote Originally Posted by djwarner View Post
    Thanks, I'll take a look. TB also only moves this much even with the engine off and the ignition in the "on" position. Could it still be torque limiting causing the issue even with the engine not running?

  6. #6
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    Quote Originally Posted by fifty View Post
    would comparing to a LGZ tune help?
    I found a stock OS manual transmission tune in the repository to compare. Thanks.

  7. #7
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    Comparing the manual factory tune to my auto factory tune, I found some torque management values that were different and also found a spot where the ECM was probably looking for info relating to traction control. Changed those to items and the engine revs freely now.

  8. #8
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    Thanks for the update.

    Glad to see you got it sorted.

  9. #9
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    guttedmiata, I'm in the middle of tuning my LFX/6L50 out of a 2012 Camaro, could you be more specific on the traction control inputs?