Chevrolet AVEO 1.4 LS: RPM automatically increasing and not coming down on start

[goelraman]

Hello, I am facing an issue with my Chevrolet AVEO, when I start the car the RPM goes beyond 3000+(btw 3200-3400) and stays there forever and doesn't come down. When I switch on the A/C the RPM slightly comes down to 2900-3000 level but doesn't come down further. I got the Throttle body replaced from the Chevrolet Service Center but no change. Pls advise and help. Thanks

[Daox]

Are there any engine codes?

[goelraman]

Hi Daox, No engine codes.

[LateOutDrsMn]

i had this happen in an older chevy(not-an aveo). Turned out the PCM was bad. Had to replace it. Bu I'd be suprized if there were no codes for a bad PCM. Is it possible the pedal is hung up on something? or maybe the throttle body(know you said they replaced it, doesn't mean they installed correctly)

[goelraman]

Thats the strange part, no codes. And no Pedal or installation problem. However interesting point I noticed is when the Service Center team reset the car through Computer it runs normally for a day or so then the same problem occurs back again. The reset has been done twice in the past few days.