How to Clean the IAC Valve

[96'er]

I need to clean the IAC valve on my '96 Q and is there anything that I need to be careful of while I have it out to clean?

I remember reading about it somewhere on the forum, but could not locate where I read something about being careful with the needle/piston?

[maxnix]

Just have the gaskets on hand.

[elwesso]

No not really anything to be careful with.. You can get it real clean by taking out the needle... Take that out and when you put it back in, screw it all the way in and turn out 2 turns.

[Mint Q45A]

96'erThis was already covered in another thread with you, and I gave some info on how I did it: zerothread?id=299876

I am not sure if the IAC on your car is different than the 94

[96'er]

Mint:

Thanks I knew I had this discussion, but could not locate it on the forum.

[GseaQ]

Hi guys,

Our '95 was idling quite high when we got iit a month or so ago - about 850-900 RPM. I checked all the cables with the engine hot and they were all as described in the FSM. I even set them to the "loose" end of the spec range. Then I adjusted the IAC valve until I got the idle down to 600 RPM.

Well, after reading Wes' comment to set the IAC to 2 turns for a base (my interpretation) setting, I thought I'd check where it was now set. Actually, the engine does seem just a tiny bit lean just off idle. That's what got me wondering.

Anyway, the result was the IAC screw was out just one turn. Is this enough? So today with the engine hot and off, I set the screw to 2 turns out. Upon starting the engine, it went from 1200-1500 RPM for a few seconds and then settled at 750-800 RPM - too high for me. I turned the screw in 1/2 turn and got the idle down to 725-750 RPM (indicated) - still too high for me. I want 650 which I'm sure will require nearly another 1/2 turn in.

As a side note, when resealing the valve covers we discovered the vacuum hose to the EGR valve was cracked open pretty bad (like it was cut halfway through). Oddly, the car still ran smooth and strong. Anyway, we replaced the hose.

Any ideas? Another vacuum leak somewhere?

Thanks,Glenn

[Infinitiguy19]

Hey I have pretty much the same problem as GseaQ. His post may be easier to understand rather than mine so hopefully that helps the people reading and I find this problem.