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Giggle Squirt
06-27-2008, 01:47 AM
How do you properly test the IAC?

J*B
06-27-2008, 06:49 AM
Remove the IAC and disconnect the 4 wire plug to it. Wiggle the IAC pintle end back and forth while applying LIGHT pressure so as to retract the IAC pintle back into the IAC motor.

Look into the pintle seat within the throttle body for any roughness or ridges of metal, Also look for same on the pintle of the IAC.

Using a flashlight check inside of the throttle body of where the pintle SEATS and inspect for debris, roughness or damage as it also should be a very smooth surface.

Spray some carb cleaner into the pintle valve seat area within the throttle body so as to clean out the air channel as it gets a CRUD build-up over time and requires cleaning.

Once you verify NO damage to the pintle or pintle SEAT area and with the pintle RETRACTED reinsert it back into the throttle body and plug it in and start the vehicle and the IAC should SELF ADJUST to it's proper setting UNLESS you have damage as said above.



Test with scan tool..
http://www.xse.com/leres/efidiag/iac.html

Giggle Squirt
06-27-2008, 09:46 PM
Oh, i was told with a ohm meter... i was wondering what two wires to test.

mboy67
06-28-2008, 08:19 PM
it's a motor so all a ohms test will tell you is if the windings are within spec's providing you have info as to what they are.

Best to do what JB said it's the best way to deal with them.