Removal of IAC

[AmuletOfNight]

I tried to remove my IAC valve today because I want to clean it and see if it resolves my cold stutter in my engine. But I can't get the screws out that hold it in place! It's held in with two Phillips head screws and I have tried quite a bit to get them out! I have sprayed PB Blaster on them to no avail, and I have tried to break them loose with brute force, but they just won't budge. Is it safe to
Be drilling these screws out with the IAC being right there? Or does anybody have a better technique for removal of these screws? They're started to strip! (Why couldn't they just use a bolt? It would have been so much easier!)

[sly]

the screws that hold the IAC motor to the valve or the valve to the throttle body. They're big hex heads on the throttle body side (at least on my cars). That's the part to worry about. Removing the motor from the valve won't give you access to the channel that needs to be cleaned. You can, however, just hose it out from inside the throttle body if it's not willing to be removed. Just spray directly into the ports on the side from inside.

[AmuletOfNight]

If looks like those screws are the screws that hold the motor to the valves. I'll have to look closer to find the hex heads that hold the valve in.

[VicCrownVic]

Like Sly said, you don't want/need to remove the screws that hold the motor to the valve. The bolts that hold the whole IAC assembly to the throttle body can be removed using 5/16 socket or 8mm socket. Like the picture below, remove the bolts circled in green not the screws indicated with red arrows. The IAC in the pic is shown with the bolts already removed. Also the electrical connector in the pic is angled different than what you probably have, but other than that it should be identical to yours.

[Hearsesrock427]

Like Sly said, you don't want/need to remove the screws that hold the motor to the valve. The bolts that hold the whole IAC assembly to the throttle body can be removed using 5/16 socket or 8mm socket. Like the picture below, remove the bolts circled in green not the screws indicated with red arrows. The IAC in the pic is shown with the bolts already removed. Also the electrical connector in the pic is angled different than what you probably have, but other than that it should be identical to yours.

[ATTACH=CONFIG]40885[/ATTACH]

D'oh. No wonder my idle's still wonky- I never cleaned it properly. I took off the two screws.... had to use pliers on the top screw. It wasn't pretty. Still went back together, but I quickly got the sense there was a better way. Thanks for the tip + accompanying visual aid!

[VicCrownVic]

It may be easier to remove those screws once you have the whole assembly off of the car, but it's not entirely necessary. I have removed those screws once but usually I just spray some carb cleaner in the ports and try to get as much carbon build up taken care of from there.

[LithiumCobalt]

..

[AmuletOfNight]

I don't think it looks like mine at all. This is what mine has on it and I still can't figure out how to get it off. Should I just remove the airbox off the intake and spray in there?

[miamibob]

Just to be clear, what year/model are we talking about??

[LithiumCobalt]

Ah yes, I remember this little bastard. Huge pain in the ass because of where it is located. It's impossible to get a screwdriver on the screws squarely because the wiper mechanism is in the way. Ford also used Loctite on the damn screws at the factory. My solution? A hammer and large flat screwdriver. I destroyed it via cracked plastic. I had to replace it anyways since it was stuck shut. Once I had all of the sensor plastic mostly removed, I backed the screws out with vice grips. Replace the screws with allen screws with the new sensor. Not really worth trying to clean these. I just replaced with new.

[AmuletOfNight]

Removal of IAC

Just to be clear, what year/model are we talking about??

1994 Grand Marquis

[IPreferDIY]

... It's held in with two Phillips head screws and I have tried quite a bit to get them out! ... I have tried to break them loose with brute force, but they just won't budge. ... Or does anybody have a better technique for removal of these screws? They're started to strip! (Why couldn't they just use a bolt? It would have been so much easier!) ...

I hope there's a special place in hell for engineers who come up with such annoying crap. Here's something you might try if you haven't already. Use a Phillips screwdriver bit and a small ratchet. Make sure the bit is nice and snug in the screws, and use the right size socket on the bit. Using a ratchet allows you to push into the screw head while applying a greater twisting force. Stripping is still a possibility, so be careful.

[miamibob]

On a '94 isn't the IAC lower on the intake, on the driver's side? Isn't that (if we are talking about the same part) the TPS???

[AmuletOfNight]

On a '94 isn't the IAC lower on the intake, on the driver's side? Isn't that (if we are talking about the same part) the TPS???

Idk, I thought this was the sensor. I'm not very familiar with it.

[VicCrownVic]

I wouldn't be able to tell you where it's at since I have very limited experience (like almost none) with Aeros, but looking up IAC on Rockauto it should look similar to the picture posted above or like the one below listed on RA for a 94 MGM.