Mechanics

WHERE IS THE IDLE AIR CONTROL MOTOR LOCATED IN A 5.7 . I KNOW ITS IN THE THROTTLE, BUT I CANT FIND IT . NEED THE EXACT LOCATION

1991 Cadillac Brougham • 159,000 miles

Need exact location of idle air control motor. Picture would help too.
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L2wo4our
June 30, 2012.



Round housing with a 4 wire connector on the throttle body.

Why are you replacing it?

Roy

ASEMaster6371
Jun 30, 2012.
http://i1198.photobucket.com/albums/aa448/Wrenchtech/41866448.gif
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Wrenchtech
Jun 30, 2012.
Roy im replacing it because my car turns off on idle. It always turns back on for like 3 seconds then it just turns off. I happen to believe maybe its the idle air control motor. Any suggestions?

Tiny
L2wo4our
Jun 30, 2012.
Wrenchtech thanks you so much that was very helpful.

Tiny
L2wo4our
Jun 30, 2012.
I would check for vacuum leaks at the base as the base gasket is a common failure for this issue.

Make sure the egr valve is not stuck open causing a massive vacuum leak.

And lastly, it could be the valve but can be tested with a scan tool to manually operate it.

Roy

ASEMaster6371
Jun 30, 2012.
*UPDATE* I already changed the idle air control valve (IAC) and the EGR valve and also the throttle position sensor along with the pcv valve. I put all these parts new and it still does the same thing. The car always turns on but turns off after 3 seconds. I dont know if its either a leak or something causing it to choke. It also drains the battery I always have to jump start it to turn it on every time. Please help.

Tiny
L2wo4our
Jul 2, 2012.
Have you tested the fuel pressure?

Wrenchtech
Jul 2, 2012.
No I havent not yet

Tiny
L2wo4our
Jul 2, 2012.
That probably should have been the first thing you did.
It has to be 9-13PSI

Wrenchtech
Jul 2, 2012.
So I checked the fuel pressure and its good I even changed the fuel filter. What I did notice was that the car only stays on when I disconnect the hose that runs from the back of the throttle to the map sensor, once I connect it back to the throttle the car shakes and it turns off. So I'm thinking maybe I have a bad MAP sensor, so I go and replace it brand new and it still does the same thing. It only stays on when I disconnect the hose from the throttle that goes to the MAP sensor. What could this be? And after I replaced the MAP sensor the check engine light went off. So I dont know what to do anymore? Any suggestions?

Tiny
L2wo4our
Jul 10, 2012.
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