What does the Idle Air Controller do?! - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 7 Old 05-06-2002, 11:58 AM Thread Starter
 
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What does the Idle Air Controller do?!

I really want to disconnect this thing to clean up the engine a little more. I've seen some guys with a tiny K&N on it, any issues with that?

-Ed

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post #2 of 7 Old 05-06-2002, 12:21 PM
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your IAC lets air into your engine at idle when your throttle plate is closed by bypassing air around your throttle.


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post #3 of 7 Old 05-06-2002, 12:51 PM
 
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I think you need it. I controls airflow at idle and during decel.

David
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post #4 of 7 Old 05-06-2002, 01:15 PM Thread Starter
 
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Ok, but doesn't sound like the air *has* to move through the MAF (since its probably flowing too slow at idle for the MAF to register corectly). This makes sense now as, for instance, I know Chris Mureen has a small air filter on his IAC & doesn't throw any codes.

-Ed
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post #5 of 7 Old 05-06-2002, 02:23 PM
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Hi Ed,

No, I have my little K&N venting my valve covers to the air. My IAC still gets it's air through the main inlet tube on my powerpipe.

The computer feels a variable amount of air into the engine on deceleration to clean up emissions and avoid dieing. Adding unmetered air may cause strange leaning effects. That said, I see no reason why you couldn't play with the air flow through the EEC Tuner to control the over leaning condition.

Chris

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post #6 of 7 Old 05-06-2002, 02:37 PM Thread Starter
 
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Jeez, could have sworn you had one hanging off that thing. Oh well, I'm going to try ripping all that stuff out of there eventually.

BTW, do you have those little air filters on both valve covers or just the drivers side?

-Ed
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post #7 of 7 Old 05-06-2002, 03:01 PM
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I have one filter, but it ties into a Y that goes to both valve covers. I plugged the PVC inlet to the plenum so it isn't hooked up anymore.

Chris

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