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Old 07-19-2009, 10:43 PM   #1
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Default Question about IAC's

Im trying to figure out why my Marauder/Whipple/Crusher idles so damn high.

I found a vacuum leak at the # 4 cylinder and got that fixed. I even put the mating compound on all surfaces to make sure everything was sealing properly. Got the car running again and same thing. Idles at 1200-1300 in park and 1000 in gear. Its commanding 800rpm in park.

So now I have to look at the IAC. I know if I pinch the line feeding the IAC (remote setup with the Crusher) the idle dies down and the car will die.

The idle will go unaffected if I disconnect the electrical connection.

The question is:
Is the valve in the IAC supposed to be fully seated when 'off' or removed from the car. As it sits, there is a gap between the valve and the seat.
Thanks for the help in advance.
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Old 07-20-2009, 10:34 PM   #2
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Sounds like a weak or busted return spring in the IAC. You're sucking it open.
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Old 07-21-2009, 06:16 AM   #3
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Quote:
Originally Posted by zenriddles View Post
Sounds like a weak or busted return spring in the IAC. You're sucking it open.
you are correct.
Replaced it yesterday and all is well.

Ford was 40 dollars cheaper than NAPA! $84 with tax.
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