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1999 Oldsmobile Aurora

Tiny
LMG265
  • MEMBER
  • 1999 OLDSMOBILE AURORA
1999 Oldsmobile Aurora V8 Front Wheel Drive

if I drive my aurora for then 30 miles, especially on humid or rainy days, it idles very high and seems to accelerate itself. If I stop the car the engine is idling so high that the car jumps forward despite the fact that my foot is pushing the brake all the way in. When I put the car in park, it idles extremely high, 4 or 5. Usually when I shut it off and turn it back on it goes back to normal idle. When I am driving it seems like the throttle is stuck. It even accelerates up hills! No one can figure it out even experienced auto mechanics. Please help.
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Thursday, November 19th, 2009 AT 8:54 PM

1 Reply

Tiny
ERNEST CLARK
  • MECHANIC
  • 1,730 POSTS
First, is your "Check engine" light illuminated? If so, then you'll have to have that scanned. The codes will give you a place to start.

If not, then you'll have to check all of your hoses for vacuum leaks. A severe vacuum leak will make your engine idle high without setting a code in your computer. Another thing that will make your engine idle that high is a failed sensor, such as Crank/camshaft sensor, MAP, MAF sensors. However, they'd most certainly set a trouble code.

Finally, it's possible that your computer itself is failing. That's not unusual on a 10-year-old car.
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Saturday, January 9th, 2010 AT 1:35 PM

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