Engine revving when stopped

Hi,

If you mean it revs up and down, it is likely related to the idle air control valve (IAC). The IAC is responsible for maintaining the engine idle speed. Oftentimes, it simply goes bad. Other times, there is carbon or dirt build where it mounts on the throttle body.

What I suggest first is to simply remove it and inspect for corrosion, carbon deposits, or anything that seems out of the ordinary.

To get you started, here is a link that explains how to service one:

https://www.2carpros.com/articles/idle-air-control-valve-service

If you feel it is faulty, here is a link that explains in general how to replace one. If needed, you can use this to help guide you:

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Before you simply replace it, you may want to test it. The first five pics below are the testing procedures. They are specific to your vehicle.

If needed, the remaining pics are the directions/pics specific to your vehicle for replacement.

I hope this helps. Let me know if you have other questions.

Take care,

Joe

See pics below.