Iac
Lead Driver
Joined: May 2004
Posts: 6,461
Likes: 6
From: Abilene Kansas
i dont think the iac affects gas milage, but i do know that it can affect how your vehicle returns to idle. you can usually clean the old one and make it work. as for parts, i dont feel that the factory parts are better than the replacement.
Matt
Matt
FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
If the IAC is bad the truck won't start without your foot on the gas and won't idle at all.
IAC's are also very easy to service. If you remove it and spray a little WD on the valve, then actuate it with a pair of needle nose it will generally free up and not need to be replaced.
IAC's are also very easy to service. If you remove it and spray a little WD on the valve, then actuate it with a pair of needle nose it will generally free up and not need to be replaced.
Posting Guru
Joined: Feb 2007
Posts: 1,292
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i would buy the Ford one just because last time i used aftermarket ones(KEM) i got three bad GM HEI brains in a row. Id get the motorcraft one
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Senior User
Joined: Jan 2004
Posts: 153
Likes: 0
From: Wisconsin
Originally Posted by darascal
incomplete sentence in my last post I mean it comes on and is flashing(the overdrive light)
Thread Starter
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Junior User
Joined: Mar 2007
Posts: 92
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the truck is trying to drive me crazy.I took it to autozone this morning to see if they could read the code and when I left there the light (o/d) stayed off. My biggest problem at this time is the rough idle and the fact that it doesn't idle down when at a stop, seems to keep a really high idle when the defrost / a/c is on. I think the main problem is I bought a peice of s#@^ so I will have to keep up the fight.....BTW I really have enjoyed and appreciated all the input
Lead Driver
Joined: May 2004
Posts: 6,461
Likes: 6
From: Abilene Kansas
first off, even if the light goes off it doesnt mean the code is gone. it is still stored in the computer. second, you need an obdII scanner to read the code, autozone cant read these
Matt
Matt
More Turbo
Joined: Dec 2006
Posts: 624
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From: FL
Originally Posted by darascal
the truck is trying to drive me crazy.I took it to autozone this morning to see if they could read the code and when I left there the light (o/d) stayed off. My biggest problem at this time is the rough idle and the fact that it doesn't idle down when at a stop, seems to keep a really high idle when the defrost / a/c is on. I think the main problem is I bought a peice of s#@^ so I will have to keep up the fight.....BTW I really have enjoyed and appreciated all the input
More Turbo
Joined: Dec 2006
Posts: 624
Likes: 2
From: FL
Originally Posted by darascal
I will be taking it to the tranny shop tommorrow to check the codes....should I check the PCV valve for the rough idle??
check the valve and the line leading from it.