TPS spring loaded?

Discussion in 'General Chevy & GM Tech Questions' started by KidHauler, May 12, 2012.

  1. KidHauler

    KidHauler Epic Member 5+ Years 500 Posts

    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.
  2. tbplus10

    tbplus10 Epic Member Staff Member 5+ Years 5000 Posts Platinum Contributor

    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. osgprometheus

    osgprometheus Member 2 Years 100 Posts

    Not sure about the sensor man. Sorry.
  4. dipstick

    dipstick Member 2 Years 100 Posts

    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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