High Idle
Thread Starter
Racer
Joined: Jul 2004
Posts: 468
Likes: 28
High Idle
My '92 Lt1 is very slow to return to idle when I pull up to a light. It is a 6 speed and the engine does not return to idle until the car has stopped rolling and has sat stopped for a second or 2. Any ideas?
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
I just cleaned out my entire throttle body. Made a world of difference. However, your problem may just be the IAC (idle air control) located at the base of the TB. Also, check the tb plates (butterflies) for sticking / binding.
Melting Slicks
Joined: Oct 2004
Posts: 2,510
Likes: 4
From: Austin Texas
Originally Posted by ittlfly
I just cleaned out my entire throttle body. Made a world of difference. However, your problem may just be the IAC (idle air control) located at the base of the TB. Also, check the tb plates (butterflies) for sticking / binding.
and also check that your idle set screw has not been tampered with in order to partially open the butterflies ...this is the lazy mans way of increasing the idle when the culprit is bad IAC, bad EGR, vacuum leak, blah blah blah...... 
Have I done this before?.....
