IAC count ?
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 898
Likes: 1
From: Pearland Texas
IAC count ?
I''ve seen posts stating " Whats the IAC count ?". Soo, how do I count the IAC beat, knock, clicks, whatever ? I too am battling an idle issue and my IAC has been replaced. 
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
And the more counts, the more air it's letting into the throttle body (or the further the pintle has been retracted from the throttle body bore). Look for 9 to 15 at idle with the a/c off - add 10 or so for a/c operation. Turn it off and it parks around 120. That helps it to restart quickly. In fact the quick test is to note idle speed. Turn it off and restart it. Idle speed should be higher, but return to the previously noted speed in a couple of seconds or so. If that's the case - the IAC is working as advertised. Otherwise, scan it and see what the #'s are including what the ECM is targeting for RPM. If it's below 9, air is coming in from somewhere else.
