# High idle **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [September 2, 2008, 4:12pm UTC](https://community.cartalk.com/t/high-idle/19009 "2008-09-02T16:12:57Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![mlofing](https://avatars.discourse-cdn.com/v4/letter/m/34f0e0/32.png) [@mlofing](https://community.cartalk.com/u/mlofing)\ **Post date:** [September 2, 2008, 4:12pm UTC](https://community.cartalk.com/t/high-idle/19009/1 "2008-09-02T16:12:57Z")
2003 chev. cavalier, 2.2, auto., Idle is normal without a/c (800 rpms) Turn on a/c, idle goes up to 1200 rpms briefly. After it is warmed up and a/c is turned on the rpms go up to 2,500-3,000 rpms. If the a/c is turned off, the rpms will go down to 1,500-2,000 rpms. Rpms will not return to normal until a/c is off and engine is off and restarted. My OBD2 code reader read P0507 idle system-rpms higher than expected and another mechanics scanner read idle air control valve. Several other people told me to replace the iac valve. I cancelled the computer codes and installed a new idle air control valve. That didn’t fix the problem. Help?