I need your expertise again! The idle screw on my '92 doesn't affect my idle no matter if it is turned in or out. Shouldn't it? Major loss of power last week. Since then I've had the injectors cleaned. Cat is unobstructed, and chain is good. No CEL. HELP!!!!

 

the passages may be plugged up so get a can of spray throttle body cleaner and remove the screw and spray away.