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Old 11-21-2005, 13:15   #1 (permalink)
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Replacement of iac valve on 1999 crown vic

I was just wondering if the replacement of an iac valve is an easy bolt-on and if there is anything else I needed to know in replacing it for my car. Thanks.
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Old 11-21-2005, 13:40   #2 (permalink)
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Re: Replacement of iac valve on 1999 crown vic

I just replaced the IAC in my 2002 Grand Marquis, and it was about a 10 minute job, after I located it under the shroud. I bought mine from O'reilly and it was ~$53.00, and it solved my intermittent failure to idle problem.
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Old 04-11-2006, 14:48   #3 (permalink)
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Re: Replacement of iac valve on 1999 crown vic

10 minutes...but mine is working great after serious hi idle issues.... cost me .97 for carb cleaner...it was carboned up from excess idling.
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Old 12-31-2006, 09:57   #4 (permalink)
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Re: Replacement of iac valve on 1999 crown vic

Where is the damn thing located? I searched High and Low on this Forum and everyone says it is an easy swap but I can't find the IAC on
my 94 Mercury Grand Marquis. I removed the Plastic Intake Shroud or whatever you call it and see the Throttlebody but can't see the IAC.
Please HELP
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Old 12-31-2006, 17:38   #5 (permalink)
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Re: Replacement of iac valve on 1999 crown vic

I don't know if this link will work. If it does, you can get a good close up pic to help you locate it.
RockAuto Catalog

click on:
1. Ford
2. year
3. crown vic
4. emission
5. Idle air control valve
Put mouse over pic, and it enlarges

Hope this helps!
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Old 01-02-2007, 07:22   #6 (permalink)
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Re: Replacement of iac valve on 1999 crown vic

Thank you for your help. I did finally locate the darn thing. It was way low in the rear of the manifold, almost impossible to reach. Not like most of the newer and even older cars I have worked on where the IAC is in plain site and easy to reach. This thing took me 3 hours and a lot bruised knuckles and a ton of cuss words to change The real culprit was actually a breather hose that popped off that was beneath the IAC and even harder to reach. I finally got it and the IAC reinstalled and the car runs great now.
No more stalling and no more rough idle. Everything worked out great.

Thanks again for your help.

Tom
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Old 01-02-2007, 15:27   #7 (permalink)
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Re: Replacement of iac valve on 1999 crown vic

Glad ya got it fixed.
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Old 01-04-2007, 21:24   #8 (permalink)
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Re: Replacement of iac valve on 1999 crown vic

yeah, they are in a bad spot on a '94.
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