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Thread: TPS goes to 1% on startup.

  1. #1

    Default TPS goes to 1% on startup.

    I’ve got a TPS issue. TPS reads 1% at idle with no foot on the pedal. Do a TPS Autoset and it reads 0 until I start it up. Once it starts, it automatically goes to 1%. Any ideas?
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  2. #2
    Join Date
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    Default

    Install a throttle return spring, try repositioning the TPS sensor mounting, or slightly back-off the idle speed screw after a TPS Autoset so the TPS Position always returns to 0%.
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  3. #3
    Join Date
    Nov 2014
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    Default

    If it really bothers you, set your idle slightly above your Target Idle Speed, then do a TPS Autoset, then start it and back the throttle off until you get to your Target Idle Speed.

  4. #4

    Default

    It's pretty common. When you do the TPS Autoset, put a .010" feeler gauge between throttle lever and stop and then it will read zero with engine running. I will add though that usually reading 1% at idle is OK. I've only had it happen once that the ECU didn't recognize a closed throttle and I knew it because RPM would hang around 1,200. Did TPS Autoset with the feeler gauge and problem solved.

  5. #5

    Default

    Got it handled. Had to manually move the TPS sensor. All good now. Thanks for all the replies guys. I appreciate it. The feeler gauge is a good idea though.

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