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Clean your IACV - Idle Air Control Valve

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Old 07-25-09, 02:46 PM   #31
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Quote:
Originally Posted by TheMole View Post
Checkout this thread on how to remove the housing: http://www.clublexus.com/forums/perf...questions.html

I checked out that thread before I started. My setup does not look like his. His IACV is attached differently. I have no plans to take the whole IACV assy off ... just take the cover of and clean the interior. I just got back from buying a longer screwdriver.

Wish me luck ...
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Old 07-25-09, 03:44 PM   #32
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OK, I tried to remove the last screw at the bottom and the SOB stripped. I am putting everything back together and hoping that the jostling I gave the IACV does not affect performance. I am going to wait until the fall to tackle this project again as it is too hot right now.

BTW, I haven't re-read this entire thread but does anyone know what size/type replacement screw I should get for the bottom?

Thanks ...
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Old 07-25-09, 10:34 PM   #33
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Originally Posted by lexdud View Post
OK, I tried to remove the last screw at the bottom and the SOB stripped. I am putting everything back together and hoping that the jostling I gave the IACV does not affect performance. I am going to wait until the fall to tackle this project again as it is too hot right now.

BTW, I haven't re-read this entire thread but does anyone know what size/type replacement screw I should get for the bottom?

Thanks ...
This is the part number for the sc300 iacv screw: 90079-11030
I am assuming it is the same, but please verify.
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Old 07-26-09, 06:34 AM   #34
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Quote:
Originally Posted by TheMole View Post
This is the part number for the sc300 iacv screw: 90079-11030
I am assuming it is the same, but please verify.

I will do so next time I can get by the local Lexus dealership.
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Old 08-09-09, 05:58 PM   #35
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Was wondering if the IACV is the ISC sensor between my TPS and subtps (w/traction)? And if so, do I disconnect plug and take it out to clean? Do you have to recalibrate with voltmeter? I guess my confusion stem from acronyms IACV = intake air control valve
IAC Valve = Idle air control valve or ISC= Idle Speed Control. Because the IACV of the ACIS is right by the Y pipe I believe, and the other is by the throttle body but just to clarify.

thanks


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Old 08-12-09, 06:46 AM   #36
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so i tried cleaning my iacv but i stripped 2 screws so i stopped. what should i do? should i leave it as it is?
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Old 08-23-09, 02:13 PM   #37
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I had my IAC cleaned by Vinam and it solved my problems of occasional low idle and stalling
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Old 04-15-12, 07:57 PM   #38
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Bump for some great info.


New SC owners should check this out. Trying this in the AM to see if it solves my problem
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Old 11-19-12, 05:54 PM   #39
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Thank you , mole!! , I recently installed a cold air intake on my 93 SC 3, and everything you explained with the idling is exactly what was happening once I fired it up , I tried resetting the ecu and that did not help, so I was frustrated not knowing what was wrong!! when I get it done I will report back , thanks alot!! for the thread!!
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Old 12-29-12, 04:05 PM   #40
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Default 94 ls400 iac 22270-50020

Wondering either testing procedure or cleaning or should i replace.
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Old 07-08-14, 01:17 AM   #41
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For what it's worth, NEVER clean MAF Sensor on Lexus'/Toyota as they have their own cleaning mechanism inside. You'll f@$% it up if you do! How do I know? Because I DID IT! Matter of fact on the can of CRC MAF Cleaner it reads, "NOT for use in Lexus' and most Toyota's." And they're not kidding, lol. I ruined my MAF Sensor and had to replace it and am still having idle problems (93 Lexus SC300). Gonna try doing what this thread suggested. Thanks!

"Learn from the mistakes of others because you won't live long enough to make them all yourself." — Eleanor Roosevelt

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Old 07-10-14, 06:45 PM   #42
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great post !! i will be doing this on the weekend!
thanks!
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Old 07-10-14, 06:45 PM
 
 
 
 
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300, 400, air, bad, control, gs, iac, iacv, idle, lexus, low, ls400, rx300, symptoms, valve

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