Question about IAC's

Zack

4 Doors 4 Life
Joined
Mar 21, 2004
Messages
6,295
Reaction score
5
Location
NW Indiana
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.
 

zenriddles

Molon Labe - come and take them!
Joined
Aug 18, 2005
Messages
3,294
Reaction score
124
Location
Holiday Inn
Sounds like a weak or busted return spring in the IAC. You're sucking it open.
 
OP
Zack

Zack

4 Doors 4 Life
Joined
Mar 21, 2004
Messages
6,295
Reaction score
5
Location
NW Indiana
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. :biggthump
 

Create an account or login to comment

You must be a member in order to leave a comment

Create account

Create an account on our community. It's easy!

Log in

Already have an account? Log in here.

Top Bottom