1990 deville 4.5: Just replaced my ISC motor and having issues with the adjustment. Set curb idle screw to the correct RPM and screwed the fully retracted plunger in all the way until it bottoms out, yet it's still in contact with the throttle causing a tiny gap preventing the throttle from resting on the curb idle screw. There's no room to set the .060 gap between ISC plunger and throttle. ISC is not increasing throttle for cold starts and ratchets after shutdown. Also I am unsure of the ISC learn procedure. Any help is appreciated.