'87 LX High Idle RPM

[Bill87LX]

I have an '87 5.0 LX with 44000 miles. After driving it for about 15 minutes the RPM will jump to 2500 RPM and stay there. After coming to a complete stop it is still at 2500 RPM. If I shut it off and restart it it will be fine. It seems to do it when the weather is warmer.

 

[BlownFiveLiter]

Welcome to :SNSign:

Please read the Useful Technical Thread Index sticky at the top of the forum. Inside that thread contains a link to the Surging Idle Checklist, which will likely contain a fix to your high idle issue.