420A really high idle

[jacob238]

It's a 99 eclipse with the 420a motor. 5 speed. When I turn the car on it's idleing at about 2500 and as I let it sit, it slowly makes it's way up to about 3100. What could cause this?

 

[Lou98GSX]

check for codes if you don't have any then you have to check your tps voltage . at idle it should be below 1 volt also check for any vacuum leaks .another thing is make sure your throttle cable is adjusted right.

 

[Brinker]

^vacuum leaks is probly it but check all that lou said

 

[boblong6]

check the throttle cables are in place right cause my old car did that and that was the problem with mine