Notices

How do I clean the Idle Air Control valve?

 
Old 05-27-2004, 03:37 PM
  #1  
Eurotrash
Thread Starter
 
Join Date: Apr 2002
Location: Marin County, California
Posts: 716
Likes: 0
Received 38 Likes on 35 Posts
How do I clean the Idle Air Control valve?

It seems there's an epidemic of idle speed related problems that are caused by a dirty or sticking or defective IAC valve. I'm getting a bit of a stumbling idle on my 2001 CL-S, and I want to clean the IAC valve.
A long time ago, after the car had sat for almost a week during cold weather, when I started it up, it started surging between about 600 and 2500 RPM. I called the dealer and headed toward there, but by the time I got there it had cleared itself and never happened again. But the service writer said that it was most likely the IAC valve, but he wouldn't change it unless he could duplicate the problem. And now it's out of warranty....
So, it looks like I need to remove the battery to get to it, but I would rather have someone who knows how to do it describe the proper procedure. And pics would be a big help. I even think this could be a Sticky. Thanks!

Tosh
Tosh is offline  
Old 05-28-2004, 08:09 AM
  #2  
Registered Member
 
scalbert's Avatar
 
Join Date: Sep 2000
Location: Woodstock, GA
Age: 48
Posts: 9,431
Likes: 0
Received 0 Likes on 0 Posts
One easy way may be to spray some carb cleaner into the TB while it is running. It might stall on you but doing this a few times should help.
scalbert is offline  
Old 05-28-2004, 08:30 AM
  #3  
Moderator Alumnus
 
SiGGy's Avatar
 
Join Date: Dec 2001
Location: Lenexa, KS
Age: 42
Posts: 9,260
Likes: 0
Received 1 Like on 1 Post
On my GF's Mitsubishi galant I took apart throttle body and cleaed it out with carb cleaner. Took me about 2 hours.

I haven't had to do the CLS yet...
SiGGy is offline  
The following users liked this post:
bowjack217 (01-19-2019)
Old 05-28-2004, 08:57 AM
  #4  
Registered Member
 
Join Date: Oct 2000
Location: Coppell, Texas, USA
Posts: 1,514
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by scalbert
One easy way may be to spray some carb cleaner into the TB while it is running. It might stall on you but doing this a few times should help.
or first fill up at chevon and put in a bottle of chevon techoline (sp) injector cleaner... After one tank I bet your problem will go away..
fender4 is offline  
Old 05-28-2004, 09:01 AM
  #5  
Registered Member
 
scalbert's Avatar
 
Join Date: Sep 2000
Location: Woodstock, GA
Age: 48
Posts: 9,431
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fender4
or first fill up at chevon and put in a bottle of chevon techoline (sp) injector cleaner... After one tank I bet your problem will go away..
If it is the IAC then a fuel additive won't help. Fuel doesn't get anywhere near the TB.
scalbert is offline  
Old 05-28-2004, 09:41 AM
  #6  
Senior Moderator
iTrader: (2)
 
fuzzy02CLS's Avatar
 
Join Date: Jan 2003
Location: South FL
Age: 43
Posts: 16,849
Received 222 Likes on 183 Posts
I took the tb off & sprayed carb cleaner all over it. It helped for a few days, then the car ran tha same again. I think mine is bad.

If the IAC is bad would it send a code? I have no codes on my car stored or otherwise.
fuzzy02CLS is offline  
Old 05-28-2004, 09:51 AM
  #7  
Registered Member
 
Join Date: Oct 2000
Location: Coppell, Texas, USA
Posts: 1,514
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by scalbert
If it is the IAC then a fuel additive won't help. Fuel doesn't get anywhere near the TB.
Yaaaa,,, I know I was just trying to fix the easy things first..
fender4 is offline  
Old 05-28-2004, 09:52 AM
  #8  
Registered Member
 
scalbert's Avatar
 
Join Date: Sep 2000
Location: Woodstock, GA
Age: 48
Posts: 9,431
Likes: 0
Received 0 Likes on 0 Posts
Originally posted by fuzzy02CLS
If the IAC is bad would it send a code?
If it completely failed or was seriously bad it would set a code.
scalbert is offline  
Old 06-07-2004, 03:17 AM
  #9  
Eurotrash
Thread Starter
 
Join Date: Apr 2002
Location: Marin County, California
Posts: 716
Likes: 0
Received 38 Likes on 35 Posts
Anyone with good instructions?

First of all, it looks like the battery may have to come out to get to the IAC valve....
Anyone with firsthand experience in cleaning it?
Tosh is offline  
Old 06-07-2004, 07:52 AM
  #10  
Senior Moderator
iTrader: (2)
 
fuzzy02CLS's Avatar
 
Join Date: Jan 2003
Location: South FL
Age: 43
Posts: 16,849
Received 222 Likes on 183 Posts
Originally Posted by Tosh
First of all, it looks like the battery may have to come out to get to the IAC valve....
Anyone with firsthand experience in cleaning it?
:sqnteek:

The IAC value is attached to the TB. The TB comes off then the IAC comes off the TB, or you can try to get it off the TB while it's still on the car. The air hose & some conencters get moved, the throttle cable gets taken off & then just unbolt the TB. It's rather easy.
fuzzy02CLS is offline  
Old 07-11-2004, 09:21 PM
  #11  
Eurotrash
Thread Starter
 
Join Date: Apr 2002
Location: Marin County, California
Posts: 716
Likes: 0
Received 38 Likes on 35 Posts
Anyone else?

It seems easiest to just leave the TB in place, right? So if I don't want to remove the TB and all the hoses, will I need to remove the battery first? Otherwise it doesn't look like there's room for the IAC valve to come off....?
Fuzzy, you say it's rather easy, but it doesn't seem that you were actually successful in cleaning the IAC valve. You just sprayed carb cleaner all over...
I think I would like more detailed instructions.
Tosh is offline  
Old 07-12-2004, 08:30 AM
  #12  
Registered Member
 
Join Date: Feb 2001
Location: Northern VA
Age: 52
Posts: 475
Likes: 0
Received 0 Likes on 0 Posts
What does it cost to have someone (the dealer) replace the IAC?
sundance_gold is offline  
Old 07-12-2004, 10:26 AM
  #13  
Senior Moderator
iTrader: (2)
 
fuzzy02CLS's Avatar
 
Join Date: Jan 2003
Location: South FL
Age: 43
Posts: 16,849
Received 222 Likes on 183 Posts
It's a $85 part plus labor.

Spraying carb cleaner on it is the way to clean it. I also used a q-tip. After you take the TB off, you can remove the IAC valve.
fuzzy02CLS is offline  
Old 09-25-2004, 06:51 PM
  #14  
Eurotrash
Thread Starter
 
Join Date: Apr 2002
Location: Marin County, California
Posts: 716
Likes: 0
Received 38 Likes on 35 Posts
More help, please

Wouldn't I be better off removing only the IAC valve from the throttle body without removing the whole TB from the intake?
Tosh is offline  
Old 09-01-2014, 08:46 PM
  #15  
New Member
 
Join Date: Mar 2012
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
That is what I did and I spent 30 minutes cleaning the IACV with Brake Cleaner, GumOut, and then PB Blaster. I assembled it back on the bottom of the TB, but when I started it up, NO LUCK! Now I am going to have to take it off again and try to disassemble it completely. I could not get the star screws of the plastic unit the first time. This, or I just succumb and throw a $100 down the drain!
KeepMeRunning is offline  
Old 09-02-2014, 08:10 AM
  #16  
lowrd on tein CS biatch
iTrader: (2)
 
CL-S progression 01's Avatar
 
Join Date: Apr 2009
Location: Mississauga
Age: 31
Posts: 4,766
Received 135 Likes on 121 Posts
Iacv are finicky. I have never successfully cleaned one and had it work for more than a week before going back to square one :-(

I'd buy a new one if it happened to my CL what that track record.
CL-S progression 01 is offline  
Old 09-02-2014, 08:37 AM
  #17  
3.5 psi
iTrader: (1)
 
gnuts's Avatar
 
Join Date: Sep 2007
Location: Canada
Age: 36
Posts: 4,468
Received 765 Likes on 617 Posts
^ same. I've cleaned one and it was never the same. I've never dissassembled it though.

KeepMeRunning: you can take a disc and score a line in the star screws then use a flat head driver.
gnuts is offline  
Old 09-02-2014, 09:32 AM
  #18  
Registered Member
 
Scottyknows007's Avatar
 
Join Date: Sep 2013
Location: Dallas, TX
Age: 30
Posts: 273
Received 16 Likes on 16 Posts
I cleaned mine with some carb cleaner like 6 months ago and after that it idled rough, it would bounce above 1000 rpms and then below. When I would come up to a stop and put down the clutch it would act like it was going to die.

I ended up taking it apart again, replacing that little gasket and found that the carb cleaner made the little piston inside stick.

I soaked in in some WD40 and then dried it out, and everything ran like new.
Scottyknows007 is offline  
Old 09-02-2014, 05:52 PM
  #19  
lowrd on tein CS biatch
iTrader: (2)
 
CL-S progression 01's Avatar
 
Join Date: Apr 2009
Location: Mississauga
Age: 31
Posts: 4,766
Received 135 Likes on 121 Posts
Finally a success story.. I wish i tried that on my pos ford probelm 7 years ago... That thing would not idle worth shit.

Yes I called it the Probelm

Went through three motors two transmissions three alternators, a rad, brake lines failed while driving.

Do I ever appreciate the CL
CL-S progression 01 is offline  
Old 03-21-2019, 08:27 PM
  #20  
New Member
 
Join Date: Mar 2019
Age: 75
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
WHAT is "TB" ????
Ness is offline  
Old 03-21-2019, 08:31 PM
  #21  
Registered Member
iTrader: (2)
 
horseshoez's Avatar
 
Join Date: Jan 2017
Location: Southern New Hampshire
Age: 63
Posts: 5,002
Received 905 Likes on 673 Posts
Originally Posted by Ness View Post
WHAT is "TB" ????
What is the context of your question and to whom are you responding?

TB often means, "Tom Brady"
TB often means, "Tampa Bay"
TB often means, "Timing Belt"
TB often means, "Throttle Body"
horseshoez is offline  
Old 03-22-2019, 12:05 AM
  #22  
Registered Member
 
whitetiger5's Avatar
 
Join Date: Dec 2003
Location: Newport beach
Age: 40
Posts: 275
Received 30 Likes on 29 Posts
Originally Posted by horseshoez View Post
What is the context of your question and to whom are you responding?

TB often means, "Tom Brady"
TB often means, "Tampa Bay"
TB often means, "Timing Belt"
TB often means, "Throttle Body"
LOL...because our new members would be coming here to talk about Tom Brady, right?

Ness, TB: Throttle Body. If you're looking for some info on Idle Air Control Valve (IACV) cleaning, I found a couple posts using google.

https://acurazine.com/forums/2g-tl-p...l-help-881808/
https://acurazine.com/forums/1g-cl-d...-motor-458330/

whitetiger5 is offline  
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Yumcha
Automotive News
7
05-09-2019 10:33 AM
cycdaniel
1G TSX Performance Parts & Modifications
5
02-26-2019 08:55 AM
peti1212
Acura ILX Discussion
14
09-24-2015 12:22 PM
Kevin Sami
Second Generation TL (1999-2003)
4
09-22-2015 09:59 AM
Yumcha
Automotive News
3
09-14-2015 10:48 AM


Thread Tools
Search this Thread
Quick Reply: How do I clean the Idle Air Control valve?


Contact Us - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.