I have a Pontiac Grand Am SE 98'. My throttle control keeps sticking when I go long distances at high speeds.. Like on a highway or freeway. Its like cruise control stays on. I have taken the air filter off to grease it up in hopes its just sticky but its still doing it ( I put the air filter back together BTW haha) . I have to turn the car off in drive and get out and mess with the throttle control coil and than I can continue on my way. I can't put it in neutral while its stuck because it revs up real high, I dont want to put it in park cause I dont want to ruin my transmission. The RPMS are sticking at two when this happens and its dangerous too because I have to fight with the car to stop because its trying to accelerate while I am pressing the brake. Getting very frustrated at this. Any suggestions or ideas on what might be wrong?
I just had the cam sensor thing (not sure exact words) replaced and the ignition switch replaced (for the 4th time in 4 years, it keeps burning out).|||There are a bunch of sensors that could be causing it to rev high, but i would check the throttle butterfly, the linkage, the throttle position sensor, or in my case a vacuum leak on the fuel pressure regulator which caused it to surge whenever it wanted to and it wanted to keep going when i stepped on the brake. hope you find the problem its a scary thing|||Try this first.
You might want to get some throttle body cleaner and clean the butterfly and the linkage real good it could be sticking. Then lubricate the linkage with some WD40. Let the Throttle body dry before you try to start the car.
Second, your throttle cable might be starting to fray. I had this happen to me but it started gradually like yours is doing then one day my throttle got stuck open and the truck wasn't stopping. Luckily I was only going about 20 mph, tried to stop and started to smoke the tires due to the throttle being stuck open by the throttle cable being frayed. By my quick thinking I turned off the truck. The neighbors came out because of all the smoke and noise of the tires.
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