Hi,
The first thing I would recommend is to clean the throttle body bore. There could be dirt or corrosion preventing the throttle plate from fully closing.
Here is a link that explains how that is done:
https://www.2carpros.com/articles/throttle-actuator-service
Also, there is an idle air control valve (IAC) mounted on the throttle body. Its function is to control the idle speed. The pintel on the IAC may not be working properly and allowing too much air to enter the engine. I attached a pic below of its location.
You also should remove the IAC and inspect/service it.
Here is a link that explains how to do it.:
https://www.2carpros.com/articles/idle-air-control-valve-service
Also, take a look through this link. You may find it helpful.
https://www.2carpros.com/articles/engine-idles-too-high
Let me know what you find or if you have questions.
Take care,
Joe
See pic below.
Image (Click to make bigger)
SPONSORED LINKS
Friday, September 15th, 2023 AT 10:46 PM