check your timing. make sure to jump the service connector first or the ecu will over ride it. also i think the IACV has to be disconnected while adjusting the throttle screw. i have a book that covers your motor so i can tell you what to do if needed. pm me if you want.

your rpm at idle should be 750 + or - 50 rpm so if you do the screw unplug the IACV to bring it up to 750 rpm.