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Old 02-15-2006, 08:45 AM   #1
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If you haven't cleaned your IAC....

Clean it now! its well worth it.

Background:
As the weather cooled down, my idle started to stick at 2krpms. Also after long trips, when stopping to pay tolls and whatnot, my car would stall out. I thought that was the extent of the problems.

How to: Sorry no pics. T5 ng900.
Remove plastic engine cover.
unscrew hoseclamps on either side.
AIC valve should be soup can sized thing just to the left of throttle body.
Peal hoses of either end.
Remove electrical connection, just squeze fitting and slide off.
Pull AIC and rubber bushing straight up.
Clean out with carb cleaner, and give a small shot of oil I used Penetrating oil.
Reinstall.

Not only did this cure my cold high idle off throttle, The car has never ran smoother. It doesn't even feel like its running at stops, and this is with a catless dp and saabsport. It also feels like it shifts better, probably because the rpms drop faster with the clutch in.

Seriosly if you haven't taken the time, its worth it. Its only a 30min job, and you only need a flathead screwdriver and some carb cleaner.
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Old 02-15-2006, 09:45 AM   #2
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I'll add this to my list because I have similar signs as you did. I've never researched it before, so thanks for the concise procedure.
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Old 02-15-2006, 10:14 AM   #3
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Stooopid questions... IAC or AIC valve? What is it and what does it do?
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Old 02-15-2006, 10:16 AM   #4
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Use foaming engine degreaser - followed by rinse with HOT water (will evaporate most of the water after on it's own) and shake dry. (or blow out with compressed air) This is how I've done this everytime with success every time. Well worth the 10 minutes it takes.
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Old 02-15-2006, 11:14 AM   #5
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Quote:
Originally Posted by BLE 9-3se
Stooopid questions... IAC or AIC valve? What is it and what does it do?
AIC=IAC... "Automatic Idle Control"

basicaly controls the ammount of air going into the engine while you are idling. If you turn on the A/C, that puts a strain on the engine and without the AIC, the engine would most likely stall. When demand for the engine is greater, the AIC opens and lets more air in the engine to raise the RPM's a bit in order to keep up with the demand for engine power (A/C, rad fan, seat heaters...etc..)
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Old 02-15-2006, 01:50 PM   #6
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I like calling it the IAC so much more

Idle Air Control makes so much more sense in my head
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Old 02-16-2006, 05:04 AM   #7
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What is this IAC of which you speak?
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Old 02-16-2006, 07:05 AM   #8
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well you Mr. aero with your T7 Dont have one, instead since your throttle body is electronic, the computer can just alter the throttle angle, and can control idle that way.
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Old 02-16-2006, 09:01 AM   #9
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Quote:
Originally Posted by WyldSaabMan
well you Mr. aero with your T7 Dont have one, instead since your throttle body is electronic, the computer can just alter the throttle angle, and can control idle that way.
Ahh... I recently had to replace the throttle body because the coils in it were all messed up Kept kicking it into limp home mode...
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Old 02-16-2006, 09:35 AM   #10
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Quote:
Originally Posted by Passion4_900
AIC=IAC... "Automatic Idle Control"

basicaly controls the ammount of air going into the engine while you are idling. If you turn on the A/C, that puts a strain on the engine and without the AIC, the engine would most likely stall. When demand for the engine is greater, the AIC opens and lets more air in the engine to raise the RPM's a bit in order to keep up with the demand for engine power (A/C, rad fan, seat heaters...etc..)
Thanks for the explanation! I am sure mine could use a good cleaning... every now and then I can feel the car "kick down" a notch, if you know what I mean.
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Old 02-16-2006, 10:06 AM   #11
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Quote:
Originally Posted by mattlach
Ahh... I recently had to replace the throttle body because the coils in it were all messed up Kept kicking it into limp home mode...
Eh - that's normal of those 9-5's - hope it was still under warrenty
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Old 02-16-2006, 11:51 AM   #12
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Quote:
Originally Posted by BurnsSide42
Eh - that's normal of those 9-5's - hope it was still under warrenty

Sadly not. It started acting up a half a year out of warranty...

About the same time I had to change my DI casette... (cut I'm getting that one covered by the recall )
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Old 02-16-2006, 04:23 PM   #13
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Try Michel Briand's website, he's posted pictures of cleaning the IAC plus others...

http://pages.infinit.net/mlbriand/saab/iac/page1.html
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Old 02-17-2006, 06:05 AM   #14
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Nice! That was really helpful! Think I might tackle this on Saturday.
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