Engine increasing idle?

1993 CHEVROLET CAPRICE
117,600 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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Recently, my car's idle speed has been increasing and is all over the place. Usually when I start it, it hovered around 750-1000 RPMS. Lately while driving and taking my foot off the gas, the car sometimes goes up to 2000 RPM. I have punched the gas and usually it either has no affect or the idle increases more. Once while I was parked, the idle increased and I took it out of gear and it raced to over 3000 RPM's. Prior to this it has been running like a top. Any help would be greatly appreciated. Thanks and enjoy your day.
Feb 24, 2015 at 3:54 PM
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MHPAUTOS
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Check idle air control motor, clean throttle body and check for vacuum leaks. Here is a guide to help with the IAC location which I think is the problem.

https://www.2carpros.com/articles/engine-idles-too-high

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Feb 24, 2015 at 4:51 PM
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