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-   -   high idle - idle air control valve ?? (

jdarby 12-28-2008 05:37 PM

high idle - idle air control valve ??
My 2000 Outbback has had this problem several times where the idle stays at around 1300 RPM. A mechanic diagnosed the problem as the idle air control valve that is screwed to the top of the engine. He called a dealer and found the part costs almost $400 new, so he cleaned it and presto, the idle dropped to normal. He also mentioned that it was the same as some GM Idle air control valves.

Some months later, the high idle problem happened again. I cleaned the idle air control valve and the problem was fixed again.

Now it won't run at the correct idle speed despite cleaning this IA control valve. I searched the Net for a used one. Found one for $250.

Here's the interesting part: The same page showed the part would fit a bunch of Chevrolet models. I searched for the part for one of the Chevys and it only costs $60!!??? The photo looks the same as my Subaru part.

Does anyone know if this is the same part with the same plug as the expensive Subaru part?

porcupine73 12-31-2008 09:19 PM

Is Chevy owned by GM? If so what you say about the parts might be true as I think that's when GM had their grubby fingers in Subaru's business. Bad company corrupts good morals.

Anyway note also that any vacuum leak and some other issues can cause a high idle condition. I would be checking all that out before replacing IACV

The IACV cleaning you mentioned - Subaru did issue a TSB about it for that era.

ETC 01-01-2009 08:24 AM

"Is Chevy owned by GM? If so what you say about the parts might be true as I think that's when GM had their grubby fingers in Subaru's business. Bad company corrupts good morals."

so who's the "bad company" and who has good morals ?

the way i read that, subaru is selling a part that appears to be identical to a gm part for 6+ x's the price retail .......

sounds like gm was only a "carrier" of bad morals and didn't catch it.

fleming442 01-01-2009 09:00 AM

So, what's the GM part number? :12:

porcupine73 01-01-2009 11:12 AM

Do you have a link to where you saw the GM valve that looked the same? I assume you have auto transmission. Not sure about the GM part # if there is one, but the Subaru part is 22650AA19C VALVE ASSEMBLY AIR CONTROL FOR 2000-2001 LEGACY OUTBACK AUTOMATIC TRANS CARS ALL looks to be about $290 as a good price from dealers selling parts online.

Make sure your throttle and cruise control cables are set right, i.e. they're not holding the throttle open slightly rather than letting it close all the way.

jeremu 01-06-2009 03:04 PM

Where is the IAC located?

This is the Subaru one. I don't know what the GM looks like

porcupine73 01-06-2009 03:24 PM

Hi Jeremu and :welcome2:. That is a Subaru IACV, but it is for the earlier style induction system with a MAF. The '00 Outback has the speed-density MAP based setup with the IACV mounted on top of the throttle body.

jdarby 01-09-2009 08:11 PM

Thanks for all your interest.
The high idle problem turned out to be a different devise and not the IACV.
Went to the bone yard and tried two used IACVs and no change in idle speed.
It was obvious that the high idle was stopping coincidentally after cleaning the IACV but not because of the cleaning.
The young gut at the yard said he saw this problem before and pointed to a black plastic box located to the left of the IACV on the left side of the intake manifold. (Sorry, but I don't remember what he called it.) It also was secured with two screws that were in slots to allow rotation of the box. He loosened the screws and rotated the black box back and forth and we started the engine and then he rotated it some more until we were at the right RPM. PRESTO!!! Prolem fixed. It works great now.
I tipped him what I saved on the used IACV.
I hope this info prevents someone else from buying a $400 IACV they don't need. Thanks again.
P.S. the close up of the IACV pictured above does not match the one on my Outback.

porcupine73 01-09-2009 09:08 PM

Hm...was it the throttle position sensor?

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