2003 Bonneville high idle

[Dirtdobber1977]

2003 Pontiac Bonneville I can run the car for about a hour and the cars gets a high idle about 2- 2,500 rpm. I've replaced the IAC,TPS,MAP,MAF and it still does the same thing any suggestions

 

[melsg5]

Do you have a check engine light on?
I know you said the IAC is new, does it pass the tests in this article?

Idle Air Control Valve (IAC) - Function - Failure Symptoms - Testing

So, The idle air control valve (IAC) is responsible for managing the engine's idle speed. Furthermore, the idle air control valve (IAC) is a major

dannysengineportal.com