[CDMEngineer]

I am having a problem with my with my idle. When I start my car the idle is around 2000 rmps, after a few minutes the idle will drop to 1500 rmps. Sometimes the rmps will drop to about 800. What could cause this problem?

 

[Suek]

Try this. I replaced the IAC. You can clean it too, But it didn't work for me. Or it could be the TBS. Ford Mustang IAC IAB - Solving your idle problems

 

[heavy metal]

Welcome to the site!!