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  1. #1

    Default TPS spring loaded?

    Is the throttle position sensor spring loaded, or just an electrical range sensor? The high idle issue is back in the '99, and I was told to check to see if the spring actuates. It didn't. I haven't had time to get into the shop to check for codes or meter readings - just trying to build my case before I get there.
    The tranny is hunting a bit, and both mufflers are blown out at the welds, so maybe a vacuum leak or no back pressure... I don't know.

    All help appreciated.

    1999 Chevy K2500 Suburban 350
    K&N, reworked cai, Thrush cat-backs
    Vinyl, cranks, floor shift, and rear air!

  2. #2


    I always thought the TPS was an electrical range sensor.
    Idle will creep up a little with blown mufflers, no back pressure less force required to push the air through.
    Hunting trans though isnt something you see with blown mufflers normally.

  3. #3


    Not sure about the sensor man. Sorry.
    Please Tell Your Boobs To Quit Staring At My Eyes

  4. #4
    Sr. Engineer
    Join Date
    Dec 2011
    11-22-boogie woogie avenue


    You need to check the tps voltage .55 volts at closed throttle. At wot 4.50 volts ,and should get a good even voltage rise with no fluctuations
    When opening throttle to wot. Also a bad tps will make trans erratic. You need to scan it see if any codes set.
    I would also clean the maf sensor .

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