Hello,
One of the common reasons for high idle is an idle air control valve.
Overtime the spring inside the valve can go weak or become seized and allow more air flow than necessary, which leads to higher idle.
Many times, cleaning out the IAC can improve the idle quality.
So, if you have the IAC already it will be a good idea to replace it.
Take a look at this guide:
https://www.2carpros.com/articles/engine-idles-too-high
Let me know of any questions.
Thank you.
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Monday, December 6th, 2021 AT 9:21 AM