1. Welcome to Jeeps.net!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Jeep discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Jeep owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site
    Quick Links: Fuel injector Muffler Soft top recommendations Code reader Best GPS for your rig Where to mount aux light rocker switches?

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

    #1
    Sgarris [OP] Member

    Joined:
    Aug 23, 2016
    Member:
    #114
    Messages:
    7
    Gender:
    Male
    First Name:
    Scott
    Vehicle:
    Black 4.0 sport wrangler
    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
     
    Sgarris, Aug 23, 2016
    #1
  2. Aug 29, 2016 at 4:43 PM
    #2
    Bob

    #2
    Bob Well-Known Member Moderator

    Joined:
    Jul 18, 2016
    Member:
    #1
    Messages:
    771
    Gender:
    Male
    Scott did you make any progress on this?
     
    Bob, Aug 29, 2016
    #2
  3. Aug 29, 2016 at 6:27 PM
    #3
    Sgarris

    #3
    Sgarris [OP] Member

    Joined:
    Aug 23, 2016
    Member:
    #114
    Messages:
    7
    Gender:
    Male
    First Name:
    Scott
    Vehicle:
    Black 4.0 sport wrangler
    No didn't get an answer
     
    Sgarris, Aug 29, 2016
    #3
  4. Aug 30, 2016 at 8:18 AM
    #4
    C2T

    #4
    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    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,
    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.
     
    C2T, Aug 30, 2016
    #4
  5. Aug 30, 2016 at 2:23 PM
    #5
    Sgarris

    #5
    Sgarris [OP] Member

    Joined:
    Aug 23, 2016
    Member:
    #114
    Messages:
    7
    Gender:
    Male
    First Name:
    Scott
    Vehicle:
    Black 4.0 sport wrangler
    Thanks checking it on computer.
     
    Sgarris, Aug 30, 2016
    #5
    C2T likes this.
  6. Aug 31, 2016 at 10:07 AM
    #6
    Sgarris

    #6
    Sgarris [OP] Member

    Joined:
    Aug 23, 2016
    Member:
    #114
    Messages:
    7
    Gender:
    Male
    First Name:
    Scott
    Vehicle:
    Black 4.0 sport wrangler
    The computer said P0121- throttle position sensor switch A circuit range performance promblem. Any quick fixes?
     
    Sgarris, Aug 31, 2016
    #6
  7. Aug 31, 2016 at 10:35 AM
    #7
    C2T

    #7
    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    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,
    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.
     
    C2T, Aug 31, 2016
    #7
  8. Aug 31, 2016 at 10:43 AM
    #8
    Sgarris

    #8
    Sgarris [OP] Member

    Joined:
    Aug 23, 2016
    Member:
    #114
    Messages:
    7
    Gender:
    Male
    First Name:
    Scott
    Vehicle:
    Black 4.0 sport wrangler
    Thanks
     
    Sgarris, Aug 31, 2016
    #8
  9. Sep 13, 2016 at 6:41 PM
    #9
    C2T

    #9
    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    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,
    Any luck with this issue yet??
     
    C2T, Sep 13, 2016
    #9
  10. Sep 13, 2016 at 10:09 PM
    #10
    Sgarris

    #10
    Sgarris [OP] Member

    Joined:
    Aug 23, 2016
    Member:
    #114
    Messages:
    7
    Gender:
    Male
    First Name:
    Scott
    Vehicle:
    Black 4.0 sport wrangler
    Yes it was Tps sensor so far so good I replaced it. Thank you for your help.
     
    Sgarris, Sep 13, 2016
    #10
    Bob likes this.
  11. Sep 14, 2016 at 7:48 AM
    #11
    C2T

    #11
    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    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!!
     
    C2T, Sep 14, 2016
    #11
Register FREE to Reply!
To Top