you know i have just the opposite problem,my car idles on the low side when warmed up,then the idle surges,up and down,so low that the engine stalls while turning the wheel at real low idle.the idle control valve is brand new.also i replaced all the vacum line to the fuel pressure regulator.i also replaced a cracked valve cover air breather.what else could be causing the idle to race up then down?thanks everyone.