Idle way to high
Most probably a dirty throttle body. Carbon buildup will cause the valve to stick. Clean it out with throttle body cleaner. Check on youtube on how to do it properly.
I have a 1999 Jeep Grand Cherokee.today as I was driving my throttle became stuck and car accelerated on its own.i hit the breaks but it wanted to keep going.as I put it in park the motor reved up high so I shut it off.any thing you can think of to cause this?
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