Author Topic: Idle Air Controle Valve help ? with pics.  (Read 29548 times)

0 Members and 1 Guest are viewing this topic.

Yota4life

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Idle Air Controle Valve help ? with pics.
« on: Aug 20, 2007, 12:34:47 PM »
I removed this located under the throttle body on my 22re. It has 2 coolant lines, one coming in from the water pump, and the 2nd runs out to the bottom of the throttle body. A plug connected to the rear possibly going to ecu. Then one vaccum hose going to the intake manifold and the other runs to the bottom of the throttle body where the idle adjusting screw is.





My problem im having is my idle shudders and misses every couple seconds and I DO NOT have a cold high idle at all. I replaced the TPS sensor and completely cleaned the throttle body and intake manifold at the same time. Removed a ton of sludge. After taking the IAC apart it looks like this.


As you can see the valve sits about 1/3 open. Shouldn't it be all the way open when cold? Looks as if there is corrosion around the coolent lines. Can these be cleaned and back to working order? I havent been able to find a new replacement
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #1 on: Aug 20, 2007, 12:45:06 PM »
This is the cold air valve,  lets in more air for a higher idle when the engine is cold.   

The opening is temperature dependent...

That opening sounds about right for room temperature.     Put it in the freezer and see if you get a bigger opening.

The normal failure is the electrical portion.     There are wires running around the bimetalic strip that open/close the valve (the coolant has a lesser effect).

The resistance should be 39-59 ohms.       If you have resistance,   hook up some jumper wires (polarity doesn't matter) and see if  the valve closes.

There is a screw on the back for fine tuning the opening.
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #2 on: Aug 20, 2007, 01:06:59 PM »
Do i check the resistance with the coolant hoses connected and motor running? Thanks for the help
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

MiniSimp

  • Outdoor Enthusiast
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 0
  • Male Posts: 5,120
  • Member since Jan '05
  • SimpsonBrothers.net
    • View Profile
    • Simpson Brothers Photography
Re: Idle Air Controle Valve help ? with pics.
« Reply #3 on: Aug 20, 2007, 01:11:14 PM »
 :greengrin:

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #4 on: Aug 20, 2007, 01:37:18 PM »
O nice that helps. :)  Is there a toy FSM anywhere on the internet? I could use one.
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

MiniSimp

  • Outdoor Enthusiast
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 0
  • Male Posts: 5,120
  • Member since Jan '05
  • SimpsonBrothers.net
    • View Profile
    • Simpson Brothers Photography
Re: Idle Air Controle Valve help ? with pics.
« Reply #5 on: Aug 20, 2007, 01:43:35 PM »
Yes NCTTORA.com has one

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #6 on: Aug 20, 2007, 02:08:41 PM »
Thanks mini.

So i checked the resistance at my desk here and i got about 50 ohms.  The gap in the picture was at about 80* so i stuck it in the freezer and im going to check it in 30mins and see how it looks. It should make a little difference right? Your saying the coolant only effects it slightly but the electrical will open/close it a greater amount?
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #7 on: Aug 20, 2007, 02:25:29 PM »
Thanks mini.

So i checked the resistance at my desk here and i got about 50 ohms.  The gap in the picture was at about 80* so i stuck it in the freezer and im going to check it in 30mins and see how it looks. It should make a little difference right? Your saying the coolant only effects it slightly but the electrical will open/close it a greater amount?

Yes, without the electrical your idle will only drop down to 1000 or so.   With the electrical it drops down to the normal idle speed (when it's working correctly)
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #8 on: Aug 20, 2007, 03:31:41 PM »
Well its been in the freezer for about 2 hours now and here is how it sits.


Now would adjusting it to full open in that frozen temperature set it correctly? And make sure it closes all the way with 12v connected?
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

DTB

  • Shoutbox Moderator
  • Offline Gold Turtle Award
  • *
  • Turtle Points: 2
  • Male Posts: 7,110
  • Member since Nov '05
  • Squirrels and beer don't mix
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #9 on: Aug 20, 2007, 03:32:42 PM »
mmmmm starbucks ice cream :yumyum:
RIP KYOTA
Quote
toyminator2000 – There has to be dumb people in order for there to be smart people
Low down & durrrrrrty Rock Stacking Web Wheeler :driving: Too many Yuppies..:shake:...Not enough Hippies :flamer:  Hobbies: stealing cookies, slangin' tacos, owning tequila bars, wheeling with paco

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #10 on: Aug 20, 2007, 03:45:53 PM »
haha yes good stuff. Theres some left in there if you want it :)
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #11 on: Aug 20, 2007, 04:05:47 PM »
At room temp, the angled opening on top should just have a sliver of an opening visible........

Make sure it closes up all the way by running some jumper wires to the contact.    If it doesn't close the warm idle speed may have been adjusted down to compensate (which means when you're cold, the idle speed is too low)
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #12 on: Aug 20, 2007, 04:13:34 PM »
And that would basicly mean i need to replace it. Im going to go test it now. Do you know how much these run for?

Do you think it will be okay to spray some carb cleaner down to where the coil is to clean it all out?
« Last Edit: Aug 20, 2007, 04:20:33 PM by Yota4life »
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #13 on: Aug 20, 2007, 04:27:31 PM »
And that would basicly mean i need to replace it. Im going to go test it now. Do you know how much these run for?

Do you think it will be okay to spray some carb cleaner down to where the coil is to clean it all out?

They were $140 10 years ago........  (do an internet search for oem toyota parts and put in the part number that's on the cover)

I'd use brake cleaner.     

You can compromise by setting your hot idle speed high so that it will run cold...........
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #14 on: Aug 20, 2007, 04:46:26 PM »
They were $140 10 years ago........  (do an internet search for oem toyota parts and put in the part number that's on the cover)

I'd use brake cleaner.     

You can compromise by setting your hot idle speed high so that it will run cold...........

I searched a couple places and it comes up as an IAC for a 84-85 celica..... Would that be the same part as for the 88 22re?

When you say set the hot idle do you mean by adjusting the IAC or setting it higher by adjusting the idle screw on the throttle body?
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #15 on: Aug 20, 2007, 05:02:06 PM »
Adjust the idle screw.

If the part numbers match, it's the same part.
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #16 on: Aug 20, 2007, 09:47:48 PM »
 Thanks for all the help emsvitll. I jumped it and it didnt close or even move. Put it back on and it still has a studdering and fluctuating idle . When cold it did not have an high idle. So i need to just replace it i guess.  I found it runnning from 180$ - 230$$. Cha ching!

I applied vacuum to the EGR valve and my motor studdered badly but didnt die. It must be working then. Im going to remove it and clean it and see if that could be the problem. I need to test the AFM to make sure its working properly. On top of that theres an exhaust leak. I just put the header on last winter and i cant find a leak anywhere around the gasket and its a thorly with a 3/8" flange so i cant see that its warped. It sounds like it is coming from the exhaust recirculation tubes coming from the header and back around the motor. It must have a leak in it somewhere that i need to find and fix. Im thinking of just removing ALL the emission parts i dont need and just getting a green sticker because this motor is pissing me off. I have about 18,000 miles on the remanufatured motor. Any help or tips are appreciated so post up if you have any.
« Last Edit: Aug 20, 2007, 09:55:46 PM by Yota4life »
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #17 on: Aug 20, 2007, 10:01:54 PM »
It's summer time, you should be able to get away with a high idle for awhile until you find a deal....

Since it's broke, you can plug up the 2 air hoses, connect the coolant lines together, raise the idle speed and screw around with the air valve and you might get lucky and fix it.     The electrical connector and bimetalic strip can be pried off/out.   (got about 2 years of life out of my 'fixed' air valve before it was hopeless and I got a new one)
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #18 on: Aug 20, 2007, 10:03:20 PM »
Can you measure amps when you put the jumper wires on it?    Should be about 1/4- 1/3 amp draw....
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #19 on: Aug 20, 2007, 10:19:35 PM »
How would i measure that from my battery? Im not much of a wizz with the multi-meter. Now if i pull it apart what can i do to the bimetalic strip and electrical connector to make it work.

On another note, When it was froze it did open about half way, but i couldnt get it to close with power applied. It sorta works. Does the plug only send power to the IAC when the motor warms up?
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

emsvitil

  • Offline Silver Turtle Award
  • *
  • Turtle Points: 7571
  • Male Posts: 3,561
  • Member since May '07
    • View Profile
    • emsvitil's album
    • Buy me a soda
Re: Idle Air Controle Valve help ? with pics.
« Reply #20 on: Aug 20, 2007, 10:29:40 PM »
Just put the multimeter in line with the jumper wires (I'm assuming it has an amp mode, should be rated at a couple of amps at least to do this)

Power is supplied when you turn the ignition on....... (sort of like an electric choke)

If you pull it apart, you need to consider the air valve as wasted before you do so.   You may or may not get it to work.       Resistor wire is wrapped around the bimetalic strip to heat it up.     

I tend to tinker with things,  so I sort of figured it out on the fly (10 years ago, so I'm slight rusty on it)       You can sort of play/test with it without pulling it apart   (got a toaster oven?  watch what happens when you heat it   (don't go over 200))
Ed
SoCal
86 SR5 XtraCab
22RE  W56B
31x10.50R15

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #21 on: Aug 20, 2007, 10:48:55 PM »
Thats a good idea. Im going to try heating it when i take it back off. I read just bypassing it will fix idle problems so im going to take it out for now and get another back in by winter. I dont know exactly what affects this but the idle is weak. It likes to just die easly when im up in higher altitudes. I was thinking it was the IAC but maybe it could be something else. Im going to just go over everything
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

84Yota

  • Offline Rock Master
  • ***
  • Turtle Points: 10
  • Male Posts: 173
  • Member since Aug '06
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #22 on: Jan 17, 2008, 06:27:30 PM »
Has this problem been solved, or any other info on what you've done since? My 22re has a very similar problem and it is driving me crazy. Thanks!

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #23 on: Jan 17, 2008, 06:40:40 PM »
Has this problem been solved, or any other info on what you've done since? My 22re has a very similar problem and it is driving me crazy. Thanks!

Yes. I went and bought another IAC Valve from a recyclers and it solved my problem i had. Now it has a high idle at start up. But a little after i started this thread the engine started making noises. I had a burnt exhaust valve and ended up replacing the head with a new engnbldr street RV and threw a better cam in and now it runs GREAT! Leaky valves will cause a weak idle for sure. Theres more about it in my buildup thread.
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

84Yota

  • Offline Rock Master
  • ***
  • Turtle Points: 10
  • Male Posts: 173
  • Member since Aug '06
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #24 on: Jan 17, 2008, 07:18:15 PM »
Awesome thanks! Glad your truck is running good now. I'll be checking out/replacing my IAC pretty soon - sure sounds like your problem is like what mine does.

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #25 on: Jan 17, 2008, 07:21:08 PM »
Awesome thanks! Glad your truck is running good now. I'll be checking out/replacing my IAC pretty soon - sure sounds like your problem is like what mine does.

Great! I think i paid 25$ for a used one and it works good. Just pull it out and see if it works when hot and cold.
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

84Yota

  • Offline Rock Master
  • ***
  • Turtle Points: 10
  • Male Posts: 173
  • Member since Aug '06
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #26 on: Jan 17, 2008, 07:27:02 PM »
Great! I think i paid 25$ for a used one and it works good. Just pull it out and see if it works when hot and cold.

Will do. Your build looks good, by the way. You do nice work! :thumbsup:

Yota4life [OP]

  • Offline The 1K Club
  • *
  • Turtle Points: -128
  • Male Posts: 1,461
  • Member since Nov '04
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #27 on: Jan 17, 2008, 08:32:48 PM »
Will do. Your build looks good, by the way. You do nice work! :thumbsup:

Thanks Man! :)
88 Toyota Pickup with some stuff...
Build up: http://board.marlincrawler.com/index.php?topic=11133.160

Volcom

  • Offline The 2K Group
  • ***
  • Turtle Points: 269
  • Male Posts: 2,418
  • Member since Sep '04
  • Colorado Rocks!
    • View Profile
    • http://www.rockfrogs.org
Re: Idle Air Controle Valve help ? with pics.
« Reply #28 on: Jan 18, 2008, 11:39:39 AM »
Mine leaked coolant so I removed it.  It definably won't cold idle on it's own.  I have to sit in the truck and hold the pedal down to get it to idle.  Once the engine warms up, it idles fine.  I don't DD mine so it sits in the garage 98% of the time  :therethere: :therethere:  I would like to find one in the junkyard one of these days though.
84 4Runner
Swapped EFI and a rebuilt 22RE
Marlin Dual Ultimate crawler
Marlin high steer
TG springs
5.29's, Aussie locked front and rear
39.5" Iroks on 15x10 2.5" backspaced wheels
109" wheelbase
Addicted Off Road 8 point cage
Addicted Off Road front bumper

Addicted Off Road

Colorado Marlin members, check out the Colorado section!!!

84Yota

  • Offline Rock Master
  • ***
  • Turtle Points: 10
  • Male Posts: 173
  • Member since Aug '06
    • View Profile
Re: Idle Air Controle Valve help ? with pics.
« Reply #29 on: Jan 28, 2008, 12:13:51 AM »
I finally got around to pulling and checking my original one out, and it does the exact same stuff as yours, so I think it's definitely my problem. Now I just need to find one. Anyone have a good working cheap one? :)

 
 
 
 
 

Related Topics

5 Replies
4549 Views
Last post Feb 21, 2007, 05:04:43 PM
by Duffil
9 Replies
5844 Views
Last post Feb 07, 2008, 09:52:26 AM
by 84Yota
0 Replies
777 Views
Last post May 04, 2010, 01:57:13 AM
by doc83
3 Replies
2131 Views
Last post May 05, 2011, 01:02:46 PM
by Fiercefirstgen559
1 Replies
2299 Views
Last post Apr 30, 2013, 11:55:08 PM
by Rock4Runner