a/c and a jumpy idle

[quote:64e09a89eb="honda needs help"]i have a 97 civic hx with around 106k and when the a/c is on the idles is fine but when i turn the a/c off the rpm's jump between 1 and 2 k what can i do i have tried everything plz help it's driving me crazy[/quote:64e09a89eb]

If it is cycling alot it may be low on refridgerent. A can may get the pressures right again and solve the problem.

Actually the car is surging. The A/C causes a load on the engine and the engine responds to the computer to elevate the throttle and compensate for the pull of the A/C. Under load the surging stops. You need to be looking for a possible vacuum leak, hose, etc. Purge the cooling system of air in the system. This is purging air from the antifreeze and not the a/c. There is a bleeder on the top hose near the block. Do it with the engine running and at normal operating temp. There are other things to look for as well. IAC could be plugged. O2 could be failing. EGR valve could be dirty or need replacing.