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throttle stuck at 3500 rpm (Help)

This is a discussion on throttle stuck at 3500 rpm (Help) within the General Help forums, part of the LSx Technical Help Section category; I have a 01 trans -am ws6 and I was coming home on the highway and the car decided it ...

  1. #1
    Ride Fast or Be Last ViperSniper's Avatar
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    2005 Mustang/2008 Viper
    98 & 01 Trans-Am WS6

    throttle stuck at 3500 rpm (Help)

    I have a 01 trans -am ws6 and I was coming home on the highway and the car decided it wanted to do 75 or so and had to keep braking to slow down, had to shut the car down at lights.
    I checked the throttle cables and they were fine, looked in the throttle body and it looked ok, I did notice that my cruise control is not working but can't figure out where it is under the hood or is it mechanical or electrical, could this be stuck? any information would sure help.

    thanks
    BL

  2. #2
    Single Malt rbob93's Avatar
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    Sebring Silver
    2000 CamaroSS

    Make sure the carpet isn't under the gas pedal when you mash it to the floor.

    Common thing to happen.

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    Ride Fast or Be Last ViperSniper's Avatar
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    2005 Mustang/2008 Viper
    98 & 01 Trans-Am WS6

    no gas pedal stuck here, If I start the car up it starts idling at 3500 rpms, throttle cables work fine, gas pedal works fine.

  4. #4
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    Mystic Teal
    01 Z28

    TPS - throttle postion sensor, perhaps.

  5. #5
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    Sebring Silver
    98 Z28

    IAC sticking

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    Senior Member ninobrn99's Avatar
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    all bore 370 Trans Am

    pull the plug from the iac motor. turn the key foward but dont turn it on. leave it on for about a minute, turn the key off, plug it back in and see if it restarts your iac position. what mods does the car have?

  7. #7
    Ride Fast or Be Last ViperSniper's Avatar
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    2005 Mustang/2008 Viper
    98 & 01 Trans-Am WS6

    Quote Originally Posted by ninobrn99 View Post
    pull the plug from the iac motor. turn the key foward but dont turn it on. leave it on for about a minute, turn the key off, plug it back in and see if it restarts your iac position. what mods does the car have?

    I did unplug the iac and replug, still a fast idle no change.
    In the engine department for mods not a real lot, a Volant intake, performance chip


    BL

  8. #8
    Senior Member ninobrn99's Avatar
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    have you tried getting rid of the performance chip?

  9. #9
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    Black
    99 camaro

    Check the hose going to the PCV, if it is cracked to where it can make a car ideal high. I had it happen to me. just my .02 cents

  10. #10
    98 trans am F-Bomb's Avatar
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    chameleon
    98 T/A

    reset the pcm manualy, clears codes gives a few things a fresh start makes everything run thru its check systems, if it throws a code then you will no what it is

  11. #11
    Life in the Fast lane sunsetorangess's Avatar
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    01 SS

    Not too sure but check too see if there is a fuse for the cruis, if so pull it, also disconnect your cruise cable and see if it fixes the issue.
    J
    2001 SS, Its not the car its the Driver that matters....

  12. #12
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    2005 Mustang/2008 Viper
    98 & 01 Trans-Am WS6

    Quote Originally Posted by ninobrn99 View Post
    pull the plug from the iac motor. turn the key foward but dont turn it on. leave it on for about a minute, turn the key off, plug it back in and see if it restarts your iac position. what mods does the car have?
    It might be the iac, I disconnected it and did what you said and when I started it idling was fine then it slowly started creaping up to 2500 rpm and stayed there, then I shut it down.
    I also disconnected the ground battery to reset the pcm and I connected it , started and ran fine again then it started to rise and went to 2500 rpms and stayed there, shut it down.
    iac?

    BL

  13. #13
    Ride Fast or Be Last ViperSniper's Avatar
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    2005 Mustang/2008 Viper
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    Quote Originally Posted by sunsetorangess View Post
    Not too sure but check too see if there is a fuse for the cruis, if so pull it, also disconnect your cruise cable and see if it fixes the issue.
    J

    which is the cruise cable?

    BL

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    Life in the Fast lane sunsetorangess's Avatar
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    Hmm thats odd, you can try removing your iac valve and cleaning it, but if you said your cc went out at the same time i would look into that. On the passenger side of the engine bay, right behind the battery theres a lil black box, push the tabs in a lift cover off. Then pull on ur throttle and see if the gears are moving and all is well. I would take off my intake bellow and look inside too also make sure its not stuck open...
    How many miles are on the ride? Is it an a4?
    J

  15. #15
    Ride Fast or Be Last ViperSniper's Avatar
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    2005 Mustang/2008 Viper
    98 & 01 Trans-Am WS6

    Quote Originally Posted by sunsetorangess View Post
    Hmm thats odd, you can try removing your iac valve and cleaning it, but if you said your cc went out at the same time i would look into that. On the passenger side of the engine bay, right behind the battery theres a lil black box, push the tabs in a lift cover off. Then pull on ur throttle and see if the gears are moving and all is well. I would take off my intake bellow and look inside too also make sure its not stuck open...
    How many miles are on the ride? Is it an a4?
    J

    I will check, its a 01 TA WS6 10,000 miles

  16. #16
    Senior Member ninobrn99's Avatar
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    you did check your fuses too right? I think there's one for cc.

  17. #17
    Ride Fast or Be Last ViperSniper's Avatar
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    2005 Mustang/2008 Viper
    98 & 01 Trans-Am WS6

    Quote Originally Posted by ninobrn99 View Post
    you did check your fuses too right? I think there's one for cc.

    Yes, I did check the cruise control fuses and they are OK, I did also reset the pcm by disconnecting the power and when I restarted the car it seemed to be fine then the rpm's started to increase up to 2500 rpms, shut it down.
    confusing


    BL

  18. #18
    Senior Member ninobrn99's Avatar
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    did u clean the iac motor already?

  19. #19
    ILL SKEET IN YUR EYE
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    black on black on black
    02 z28

    whats iac??????

  20. #20
    Life in the Fast lane sunsetorangess's Avatar
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    "Iac" Idle Air control
    Controls the amount of air entering the throttle body by moving in and out. Its what lets your car idle without killing the motor.
    J

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