[chucksmith]

I have an issue that maybe you guys can help with. My car is set to idle around 1000 RPM and it seems to need this so engine will not cut off after letting off the throttle and the rpms dropping too low. It has a light flywheel. It does have a chip that I thought would take care of this problem ,but it does not. It is livable until I turn on the AC and the idle drops 150-200 rpm and it cuts off most of the time when letting off the throttle unless I blip it a bit. Do you think this is a chip issue or an idle control valve issue?