Fluctuating idle?

Hi,

This type of issue can be the result of a few things. Most commonly, it is an engine vacuum leak. Also, the vehicle has an idle air control valve (IAC) that is responsible for maintaining engine idle speed.

Here is what I suggest. First, check for engine vacuum leaks.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

If you are unable to find a leak, the next thing to do is check the IAC. I attached a pic of the IAC location for this vehicle. See pic below

Remove the IAC and check for carbon or corrosion restricting air where the IAC's pintel enters the throttle body. If there is excessive build-up, use carb cleaner, and clean it as best as possible along with the pintel valve.

Here is a link that explains how (in general) to service an IAC:

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

Let me know what you find. Also, if the check engine light is on, let me know if you had the computer scanned for codes and what they are.

Take care,

Joe