Hanging Idle

[Ford_Racing44]

I read all the threads on hanging idles on here, all of them say that the Idle Air Control valve is what causes it I pulled it off, and it didnt look real bad, sprayed it with some carb cleaner, put it back on, same thing. :damnit: so i called up Autozone and for the low price of $49.95 i got a new one, and wouldnt ya know, it still does it. is this a computer thing or what? and whats the little black knob thing on the top of the IAC?

btw the car is a 98 gt auto...

 

['03GTinFLA]

http://forums.stangnet.com/showthread.php?t=474890&highlight=copper+cap

Good pictures. The copper cap cost $.24 at Lowe's. Mines a manual and that fixed my hanging RPM's. Not sure about an auto though, but worth a try.

 

[slow96mustang]

either that or you can get that tuned out.

 

[Justin03GT]

a tune wont take care of the problem, the air inlet is oversized....another alternative if you dont feel like drilling a copper cap, take an old soda or beer can and make a restrictor plate...just take the IAC off and trace a templet onto the cut soda can using the gasket, then use scissors to cut it, and just make the new air inlet hole smaller than the gasket hole...took me all of 30 mins and works the same as the copper cap..