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Old 05-28-2010, 08:37 PM   #1
hybrid gti 2
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Question low idle need some pointers

I am working on a 01 forester. I was told I have a idle control valve problem. Is there a cleaning procedure. I wiped it off but not sure how this item works. Is there also a way to test if it's bad?
thanx
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Old 05-29-2010, 12:31 AM   #2
oli2.5RS
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what do you mean, you wiped it off? Anyways, if there's an IAC problem, you might be able to clean it by removing it and using throttle body or contact cleaner. You can remove the entire housing, and you'll need a new gasket or you can remove just the plastic control unit and you'll need to manually readjust you're idle, which is not as hard as it sounds. You'll notice the holes for the screws on the unit are slotted, so the unit can be adjusted.

If a lot of black **** comes out, its carbon build up, from th PCV valve, which is supposed to be normal.
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Old 05-29-2010, 12:39 AM   #3
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try a seafoam cleaning... put about a 1/3d of a can in the intake and let sit per directions.

Then crank and smoke out the neighborhood
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Old 05-29-2010, 01:03 AM   #4
hybrid gti 2
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Quote:
Originally Posted by oli2.5RS View Post
what do you mean, you wiped it off? Anyways, if there's an IAC problem, you might be able to clean it by removing it and using throttle body or contact cleaner. You can remove the entire housing, and you'll need a new gasket or you can remove just the plastic control unit and you'll need to manually readjust you're idle, which is not as hard as it sounds. You'll notice the holes for the screws on the unit are slotted, so the unit can be adjusted.

If a lot of black **** comes out, its carbon build up, from th PCV valve, which is supposed to be normal.
Is there a write up on this with a few pics?

Also new engine. Cleaned throttle body, intake and everything. I just avoided the sensors. Engine now has 850 miles on it.
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Old 05-29-2010, 01:56 AM   #5
oli2.5RS
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Quote:
Originally Posted by hybrid gti 2 View Post
Is there a write up on this with a few pics?

Also new engine. Cleaned throttle body, intake and everything. I just avoided the sensors. Engine now has 850 miles on it.
http://forums.nasioc.com/forums/show...highlight=iacv

there you go. What do you mean "new" engine? from the dealer? or rebuilt? Sensors like the IAC valve get transfered from the old motor onto the new one pretty often.
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Old 05-29-2010, 01:57 AM   #6
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is it throwing a cel? i had a p1501 which is an idle control solenoid. it idled super high at cold start and almost stalled at stoplights
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Old 05-29-2010, 11:57 PM   #7
hybrid gti 2
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I had the code p0506. Rebuilt engine but old sensors.
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Old 05-30-2010, 01:39 PM   #8
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When I removed the IACV from my '00 Legacy, it was full of all sorts of gunk. I don't know if "intake and everything" includes removal of the IACV by itself, but it might make a difference. (Remove, let soak, new gasket per above.)
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Old 05-30-2010, 01:49 PM   #9
hybrid gti 2
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Quote:
Originally Posted by oli2.5RS View Post
http://forums.nasioc.com/forums/show...highlight=iacv

there you go. What do you mean "new" engine? from the dealer? or rebuilt? Sensors like the IAC valve get transfered from the old motor onto the new one pretty often.
Yes I understand the wrx version of this part. What about the n/a version?
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Old 05-30-2010, 03:36 PM   #10
oli2.5RS
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Quote:
Originally Posted by hybrid gti 2 View Post
Yes I understand the wrx version of this part. What about the n/a version?
I sold my '00 NA about 3 weeks ago so I can't go check, my 2.2 is probably different, but if you do a search, even on google, you'll probably find a picture to help you.

on the 2.2L its on the passenger side of the throttle body.
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