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car accelerating on its own

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Old 07-25-2012, 12:03 PM   #1
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Default car accelerating on its own

a new problem just came up last night on my way home, the car just kept accelerating i had to ride the breaks to go under 25. anyone know why this is happening or a way to fix it? and also my battery had died out of no where and i had to jump it before i left the house.
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Old 07-25-2012, 12:16 PM   #2
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return spring in the T body is messed up, or the throttle positioning sensor went bad... im leaning towards the first one
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Old 07-25-2012, 12:18 PM   #3
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Assuming you were not driving downhill, then it sounds like the engine is getting more air than commanded by your right foot. This is either due to a vacuum leak, or a stuck throttle cable/blade/etc., or an IAC that, for one of several possibile reasons, is allowing too much airflow.
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Old 07-25-2012, 12:22 PM   #4
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how would i go about figuring out which one it is
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Old 07-25-2012, 12:39 PM   #5
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Go under the hood. Check the TB blade to see if it's stuck. Get some electrical connection cleaner and clean the IAC and TPS connections. Use some Throttle Body Cleaner to clean the IAC and throttle body.
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Old 07-25-2012, 03:44 PM   #6
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Quote:
Originally Posted by trans/am man View Post
a new problem just came up last night on my way home, the car just kept accelerating i had to ride the breaks to go under 25. anyone know why this is happening or a way to fix it? and also my battery had died out of no where and i had to jump it before i left the house.
Kudos to you for not panicking and getting out of the situation safely. (I probably would have **** myself.)

Had you been an old lady driving a Toyota, you might have ended up a lot worse and we may have been hearing about this on the news!
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Old 07-25-2012, 04:30 PM   #7
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haha thank you, but yeah i handled it a little better then the Toyota drivers did. I just cleaned the throttle body and surrounding things and everything seems back to normal for the time being thank you guys for the help.
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Old 01-31-2013, 03:35 PM   #8
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this just happened to me as well. battery was completely dead. after a few bad attempts of starting it durring the jumping process it started up let it set for about a min or so and then went to drive instantly i could tell something was not right. rpms where to high as i was driving away got on the road and thought it would stop after a min or so but the car kept gaining speed i stopped about a mile or two away from where i jumped it rpm's still staying around 1500 or a little higher at idle. turn the car off and back on and it was back to normal. no idea what caused it never had this happen before after jumping the battery.
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