i just bought a 93 nissan 300zx nonturbo. a week ago i noticed it seems as if it wants to stall at stop lights, but it kicks back up in rpm. it drops to about 450 and goes back up to 550 or so. it just bounces. what could it be? i put lucas oil injector cleaner in it when i first noticed it and it continues to do it a week later. i dont know if it is a vacuum leak, idle air control valve, bad injectors or what. has anoyone else had the same problem? thanks
