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Lucky_317
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Lucky_317 Jan 3, 12:41am

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2000 Toyota Celica

Joined: Sep 2003
Posts: 2,242
Fontana, CA
Idle Air Control Valve - How To Properly Clean

Problem - Dirty Idle air control valve.

Symptoms - Poor idle, self reving at idle and poor performance at a constant rpm.

How to fix - Clean your idle Air control valve.

Difficulty - Easy

Time - Approximately 1hr

Tools - 12mm socket, pliers, phillips head screwdriver, 2 small hose clamps (or small bolts to plug the coolant lines)
_______________________________________________________________________________

** If you don't know how to remove your intake prior to starting these instructions, put down your tools and don't attempt this**

There's a right way and a wrong way to do this. You could simply spray throttle body cleaner into the small hole on the inside of the Throttle body but it won't even come close to getting it clean.


Before/After:
Linked Image


Step 1:
remove the 2 Wire harnesses from the throttle body.
Linked Image
Linked Image
Linked Image

Best 60' 1.959 best 1/4 - 13.7 @ 101mph

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Lucky_317
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Lucky_317 Jan 3, 1:00am

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2000 Toyota Celica

Joined: Sep 2003
Posts: 2,242
Fontana, CA
Step 2:
Remove the 3 Hoses from the Throttle Body. The Large one on top is easy. The 2 on the bottom are coolant lines so these 2 will need to either be crimped or you'll need to insert a small bolt to prevent the coolant from leaking everywhere. They are located underneath the Throttle Body and connect to the Idle Air control valve.

Linked Image


Step 3:

Remove the throttle cable from the throttle body.

Linked Image


Step 4:
Remove the 2 12mm nuts on the top and the 2 12mm bolts on the bottom.

Linked Image
Linked Image
Linked Image

Best 60' 1.959 best 1/4 - 13.7 @ 101mph

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Lucky_317
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Lucky_317 Jan 3, 1:14am

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2000 Toyota Celica

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Posts: 2,242
Fontana, CA
**Note: I cleaned the TB and the IACV using the hole in the TB method to show how little gets cleaned without actually removing the IACV.**


TB before cleaning
Linked Image
**on the left side of this pic you can see the hole where most people clean their IACV the wrong way**
Linked Image

TB after Cleaning ** the IACV is already removed in these pics**
Linked Image
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Now that the Throttle Body is OFF and cleaned we can move on to removing the IACV.

The IACV is located underneath the throttle body as seen in this picture...
Linked Image


Step 5:
Remove the 3 screws on the IACV.
Linked Image

Best 60' 1.959 best 1/4 - 13.7 @ 101mph

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Lucky_317
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Lucky_317 Jan 3, 1:25am

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2000 Toyota Celica

Joined: Sep 2003
Posts: 2,242
Fontana, CA
You'll want to clean this out very good. You can see how dirty it still is after I sprayed it with cleaner from the inside of the TB.

Linked Image
Linked Image

Here's the IACV** see how filthy it is as well**
Linked Image

You'll want to remove the gasket prior to cleaning.
Linked Image

Here's what it should look like after cleaning
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Linked Image

Pay close attention to the bar in this pic. It will be very dirty
Linked Image

Best 60' 1.959 best 1/4 - 13.7 @ 101mph

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Lucky_317
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Lucky_317 Jan 3, 1:25am

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2000 Toyota Celica

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Posts: 2,242
Fontana, CA
That's all there is to it. cool Once you do that your car should idle nice and smooth and your car should run nice and smooth any time you're at a constant rpm. thumbsup thumbsup

Best 60' 1.959 best 1/4 - 13.7 @ 101mph

Joined: Nov 2003
Posts: 453
Jtultra
Senior Member
Jtultra Jan 3, 6:19am

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2000 Toyota Celica

Joined: Nov 2003
Posts: 453
Marietta, GA
wow, should have done that when I was putting in my hondata heatshield...I've had enough of my engine for a good month or so

The 2ZZ god

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GTaintsobad
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GTaintsobad Jan 4, 3:54am

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2000 Toyota Celica GT

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Posts: 173
Saskatoon, Sask
about how long does it take for your TB to get that dirty? Does using an aftermarket Intake make a difference?

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hephaestus
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hephaestus Jan 4, 4:29am
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Posts: 1,228
New Jersey
Originally Posted by Lucky_317
That's all there is to it. cool Once you do that your car should idle nice and smooth and your car should run nice and smooth any time you're at a constant rpm. thumbsup thumbsup

I had always thought that the spraying way wasn't consistant with a well cleaning and rather difficult unless you have 4 arms or another person helping you rev the car and even that wouldn't be good enough, but good enough.
I have to admit though my throttle body and IACV wasn't nearly as bad as yours.
Nice write up.

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Lucky_317
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Lucky_317 Jan 4, 8:53pm

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2000 Toyota Celica

Joined: Sep 2003
Posts: 2,242
Fontana, CA
My TB isnt usually that dirty. These pics came after I sucked up all the water into the TB.

Best 60' 1.959 best 1/4 - 13.7 @ 101mph

Joined: Oct 2004
Posts: 7
RIP
New Member
RIP Mar 5, 8:08pm
2000 Black Toyota Celica GT
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2000 Toyota Celica GT

Joined: Oct 2004
Posts: 7
N.Hollywood CA
At what mileage should this be done?

Joined: May 2004
Posts: 529
renfield90
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renfield90 Mar 12, 6:11am

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2001 Toyota Celica GT

Joined: May 2004
Posts: 529
Tempe, AZ
How similar is this on the GT?

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Lucky_317
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Lucky_317 Mar 17, 6:35am

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2000 Toyota Celica

Joined: Sep 2003
Posts: 2,242
Fontana, CA
on a GT it's pretty close to the same.

______________________________________

there's no set mileage. it should be done whenever it becomes a problem.

Best 60' 1.959 best 1/4 - 13.7 @ 101mph

Joined: Feb 2005
Posts: 15
marco9394
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marco9394 Apr 11, 11:51pm

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2000 Toyota Celica

Joined: Feb 2005
Posts: 15
Lowell, MA
Becareful with those smaller hoses connected underneath the TB
Be prepared to stock in some bolt to prevent coolant shooting out.
When i was doing mine, the coolant sprayed everywhere even got some in the header wtf
I ended up donate my $5 t-shirt, a hanger and half an hour trying to suck up all the coolant that got into the header thumbsdown
And now my car has a weird water flowing sound underneath the car when i rev it at idle but the car runs pretty smooth tho.
Any clue what's wrong with it? would it be bubbles in the cooling system because I topped off the coolant receiver? confused

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Boynxdoor
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Boynxdoor Jun 15, 3:31pm
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Posts: 6
UK
Hi Guys, I'm new here and was looking at this Guide. Well I'm glad that I just followed the wrong way of cleaning the throttle body as I don't want to mess with that bearing that is hidden behind the IACV. To be honest the Car felt so much better after I did the other guide, the one You just need to take off that big rubber air pipe and give the Throttle body a good spray of Injector/Throttle body cleaner. I'm not saying this is no good as I want to do this as well when I have a perfect time and weather. I just want to make sure though that I'll be able to do this right to avoid ruining that bearing inside. Thank You deniance for that information and glad Your Car is running smooth now...

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CaffeineKid
CelicaSpecialist
CaffeineKid Jun 15, 9:01pm

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2008 Scion tC

Joined: May 2002
Posts: 426
California
The "Injector/Throttle body cleaner" guide which Boynxdoor is referring to:
https://www.celicahobby.com/forums/...8/Intake-Throttle-Body-How-To-Clean.html

Joined: Dec 2013
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Nyc2000CelicaGT
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Nyc2000CelicaGT Feb 19, 5:54am
2000 White Toyota Celica GT
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2000 Toyota Celica GT

Joined: Dec 2013
Posts: 10
New York
hi is it normal for my idle to be high after this? i corrected it by lowering the TB bolt that holds the butterfly open. RPM went back to 800-900. At first it was above 1500. Please email me the answer @ m.chan2@aol.com

Joined: Jul 2014
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Lhuix
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Lhuix Jul 24, 9:34am
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Joined: Jul 2014
Posts: 1
California
Is it the same way to clean the TB that doesnt have the throttle cable on the throttle body, my car is a 2004 GTS Celica Tsunami Edition, and I can't find a good guide to clean it up, here is a pic for my TB
Linked Image
subir imagenes gratis

Joined: Aug 2015
Posts: 3
Arturobel92
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Arturobel92 Sep 6, 9:39am
New Member

Joined: Aug 2015
Posts: 3
CA
I want to clean the Idle Air Control Valve of my 2000 Celica GT but I am wondering if the coolant hoses will begin to drain as much coolant as they can. Or will it just spray a little bit of coolant if I dont plug them up?

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