My idle jumps down to about 600 rpms whenever the AC kicks on, I checked the A26 wire for 5V which is suppose to tell the ECU when its about to kick on and its suppose to compensate and raise the rpms. Has anybody else had this problem? Is that normal or do I need to try another ECU?

 

mine does that too, i take it as normal....

 

Thanks, but I really dont think its normal. Sometimes it drops down around 600 and gets really rough...which just doesnt seem right to me.

 

When I turn mine on, sometimes it will drop down that low, but instantly raise back up to about 7 or 800rpm's.

 

You may want to try cleaning your idle air control valve.

 

Thanks, Ive been thinking the IAC might be the problem, but it still works fine when I crank the car(ie it idles to 1500 then steadily goes down as it warms up) which is controlled by the IAC, thus its atleast working.