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Clean your IACV - Idle Air Control Valve

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Old 07-07-09, 09:46 AM   #16
YeA 2jZ
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i got almost all the symptoms u stated above
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Old 07-07-09, 10:05 AM   #17
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Ah ok, hopefully it will fix them.
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Old 07-12-09, 04:53 PM   #18
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Is there info how to do this on sc300?
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Old 07-12-09, 05:05 PM   #19
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Quote:
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Is there info how to do this on sc300?
Are you serious??
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Old 07-12-09, 08:05 PM   #20
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Yes because my screws are messed up so I was hoping someone has some parts numbers. I will have to extract my screws first and use new ones. It seems that with sc400 you can rebuild and clean iacv.
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Old 07-12-09, 09:11 PM   #21
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Yes because my screws are messed up so I was hoping someone has some parts numbers. I will have to extract my screws first and use new ones. It seems that with sc400 you can rebuild and clean iacv.
Sorry I am kind of confused, but I'll try to help you out. The first post describes how to remove and clean the IACV for an sc300. The link provided from planetsoarer shows how to rebuild it on an sc400 and should be the same concept for the sc300.
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Old 07-12-09, 11:23 PM   #22
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I will open that up tomorrow and handle the job cus i had a problem with the IACV but it resolved itself after i tapped the outside of the cap.

( I believe the spring might have been a little stuck or something cus after i hit it a little from the outside...the problem stopped and as been over a month with no signs of low idle or engine check...etc. )

Great thread cus it reminded me to do something important
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Old 07-13-09, 12:58 AM   #23
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if you round the screws, use a dremel . Im actually replacing my TB so im doing this on my new one. Its pretty straight forwards and 100X easier if you manage to get the TB out instead of doing it while still on the car.
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Old 07-13-09, 01:07 PM   #24
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Quote:
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Are you serious??
LOL, that's what I said when I read that.

Anyways, thanx for the write-up, I need to do this as well. Hopefully it's the same for a 1jz.
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Old 07-13-09, 03:15 PM   #25
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I wish somone would post parts numbers
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Old 07-13-09, 04:38 PM   #26
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I wish somone would post parts numbers
Here are the part numbers for a 93 sc300

IACV: 22270-46050
Phillips screw w/ washer: 90079-11030

Hope this helps.
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Old 07-25-09, 09:55 AM   #27
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I am just now getting to this project. On my SC4 the black cover is held on by three (3) soft phillips-head screws. The #1 and 2 screws are on the top and easy to loosen but the third is at drop-dead bottom and very hard to remove. I have almost stripped the head trying to get it off (haven't yet).

On a lark I tapped on the IACV cover this morning an took it out for a drive. This is the problem as the car ran very rough and stalled once before recovering after a mile.

Can anyone recommend how to remove this hard-to-remove (soft) screw?

Thanks ...
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Old 07-25-09, 11:48 AM   #28
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I am just now getting to this project. On my SC4 the black cover is held on by three (3) soft phillips-head screws. The #1 and 2 screws are on the top and easy to loosen but the third is at drop-dead bottom and very hard to remove. I have almost stripped the head trying to get it off (haven't yet).

On a lark I tapped on the IACV cover this morning an took it out for a drive. This is the problem as the car ran very rough and stalled once before recovering after a mile.

Can anyone recommend how to remove this hard-to-remove (soft) screw?

Thanks ...
Checkout this thread on how to remove the housing: http://www.clublexus.com/forums/perf...questions.html
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Old 07-25-09, 11:52 AM   #29
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LoL i was just looking for this thread ot bump it. Hey mole where are the two lower bolt of the TB? I can see the two upper ones but i cant see the others so that i can back out the TB to have space to take out the IACV
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Old 07-25-09, 11:57 AM   #30
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Originally Posted by YeA 2jZ View Post
LoL i was just looking for this thread ot bump it. Hey mole where are the two lower bolt of the TB? I can see the two upper ones but i cant see the others so that i can back out the TB to have space to take out the IACV
With the intake tube removed, you should be able to access them. The 2 lower throttle body bolts are recessed so it may be hard to spot at first. The other 2 lower ones hold the tb bracket. I'll see if I can find a diagram.
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Old 07-25-09, 11:57 AM
 
 
 
 
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300, 400, air, bad, control, gs, iac, iacv, idle, lexus, low, ls400, rx300, symptoms, valve

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