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Discussion Starter #1
Ok ive read a little bit and the best way to see if yours is going out is.
correct me if iam wrong here.

Turn on your AC, setting 4, and watch your idle.

if it goes up your iac is working.
if it goes down yours is bad.

is this accurate?
 

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Discussion Starter #2
I think ive got my random morning / daily idle fluctuation and erract idle to almost failing thing down to this IAC valve. can you do something to delete the iac? block it off and allow optium idle and throttle control without it?

or should I just fix it.
 

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Your testing method is fairly accurate. Be sure the car is fully warmed up and idling in park if it's an automatic. Usually the car will idle with a non-working IAC valve.....just slower than normal. Turn on the AC and the idle should speed up slightly or remain the same. But if the idle speed goes down....you've got a problem in the system, probably an IAC issue.

I wouldn't consider trying to delete that valve.....there are other things besides the AC that depend on it, like idling in a cold condition for one, charging a weak battery more quickly for another.

Then there's the "how to raise the idle speed" thing. Your idle speed in a stock condition is controlled by the IAC valve. Trying to get around that will be difficult.
 
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