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Shifting at high speed causes stuttering

Discussion in 'Wrangler TJ (1996-2006)' started by Sgarris, Aug 23, 2016.

  1. Aug 23, 2016 at 2:38 PM
    #1
    Sgarris

    Sgarris [OP] Member

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    My 1999 jeep keeps sputtering when shifting gears at high speed. Engine light comes on then after about 3 starts engine light shuts off and it runs fine. Any suggestions
     
  2. Aug 29, 2016 at 4:43 PM
    #2
    Bob

    Bob Well-Known Member Moderator

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    Scott did you make any progress on this?
     
  3. Aug 29, 2016 at 6:27 PM
    #3
    Sgarris

    Sgarris [OP] Member

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    No didn't get an answer
     
  4. Aug 30, 2016 at 8:18 AM
    #4
    C2T

    C2T Well-Known Member

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    If the engine light is coming on, then the system is recording a code. Finding out what the code is might help a bit. I suspect crank shaft or cam shaft position sensor but this is, with so little information, just a guess.
     
  5. Aug 30, 2016 at 2:23 PM
    #5
    Sgarris

    Sgarris [OP] Member

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    Thanks checking it on computer.
     
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  6. Aug 31, 2016 at 10:07 AM
    #6
    Sgarris

    Sgarris [OP] Member

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    The computer said P0121- throttle position sensor switch A circuit range performance promblem. Any quick fixes?
     
  7. Aug 31, 2016 at 10:35 AM
    #7
    C2T

    C2T Well-Known Member

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    quick checks: TPS intermittent open or short internally. Harness rubbing and causing an open or short in the wiring. Bad connection at the TPS. Bad PCM (less likely). Water or corrosion in connector or sensor.

    Do a wiggle and connection test...wiggle everything looking for shorts and reseat any connectors.
    Look for any water in the connectors.
    If you have access to a scan tool, see what the idle and WOT (wide open throttle) readings are for the TPS. Check if they're close to spec. If not, then replace the TPS and re-check.

    Remember...this can sometimes be caused by a bad Throttle/Pedal Position Sensor or Switch if it is corroded or otherwise failing.

    Good luck.
     
  8. Aug 31, 2016 at 10:43 AM
    #8
    Sgarris

    Sgarris [OP] Member

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    Thanks
     
  9. Sep 13, 2016 at 6:41 PM
    #9
    C2T

    C2T Well-Known Member

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    Any luck with this issue yet??
     
  10. Sep 13, 2016 at 10:09 PM
    #10
    Sgarris

    Sgarris [OP] Member

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    Yes it was Tps sensor so far so good I replaced it. Thank you for your help.
     
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  11. Sep 14, 2016 at 7:48 AM
    #11
    C2T

    C2T Well-Known Member

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    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Glad it went well. Wheel Safe!!
     
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