View Full Version : High Idle Problem.

09-05-2009, 08:00 PM
Took a corner pretty hard and opened it up out of the turn, After I let off the throttle the idle won't go under 2000 RPM's. Is there anything else on a stock SC that will make it do that besides IAC or the TPS? No vaccum leaks, no lights and car runs fine( no bogging or running rich ). 89 SC 5-speed. Thanks.

09-06-2009, 10:45 AM
Anybody? I don't want to just start buying all these parts if I don't have to.

09-06-2009, 12:27 PM
Did your throttle set screw move? Try adjusting iac set screw on top of tb and see if it helps, if nothing helps it's probably a bad iac.

09-06-2009, 12:53 PM
Or dirty IAC? Can you clean the IAC on these? On my mothers 4.6L F-150 the IAC would get dirty and it would develop a high idle, then we'd take off the IAC and clean it out with some throttle body cleaner and it fixes it. Can you do that on these?