Idle air control valve??? - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 15 (permalink) Old 09-11-2006, 02:08 PM Thread Starter
Seasoned PostWhore
 
97qwikcat's Avatar
 
Join Date: Apr 2005
Location: Dearborn Heights MI
Age: 34
Posts: 2,176
Idle air control valve???

Hey guys Im taking my car Thursday to get dyno'd and the guy that flashed the computer for me to get it running didnt think the IAC valve was working. When you unplug that valve should the car shut off? Also how do I tell if it is bad? I know when you unplug it the idle doesn't change at all. Any help is greatly appreciated. Thank's in advance

Get in, Sit down, Shut up, Hang on
My mod's
True Duals W/ Flowmaters/ Underdrive Pullies/ Cold Air Induction with custom air box/Cross Drilled Rotors/Shorty Headers/ 1 Kenwood 800 Watt amp/ P&P PI heads/ PI intake/ crower stage 1 cams/ Trac lok 3.73:1 gears/ Block bored 30 over/ Forged crank/ Mahley rod's/ Diamond flat top piston's/ nos kit w/ 100shot and compucar purge/ Dual oil Filter relocator w/ oil cooler/ Trans cooler/ Trans shift kit/ Marauder T/C!
97qwikcat is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 09-11-2006, 05:34 PM
4th Gear Poster
 
Join Date: Jan 2003
Location: Toledo, OH
Posts: 288
Send a message via AIM to AtroXR7 Send a message via Yahoo to AtroXR7
if you unbolt it and manually change the amount of air that the port lets it it should move the valve. I cant go into to too much detail cause i was in the car reving when we cleaned mine. but if it looks dirty in there, brake clean and a lil engine brush with work great. (DO NOT USE CHLORINATED BRAKE CLEANER. It will produce a terribly toxic gas in engine and)

The IAC is really important to the idle control and i cant imagine you wouldnt notice some problems if it wasnt moving.
AtroXR7 is offline  
post #3 of 15 (permalink) Old 09-11-2006, 08:33 PM Thread Starter
Seasoned PostWhore
 
97qwikcat's Avatar
 
Join Date: Apr 2005
Location: Dearborn Heights MI
Age: 34
Posts: 2,176
ok so if you unplug it while it's running the car will stay the same then right?

Get in, Sit down, Shut up, Hang on
My mod's
True Duals W/ Flowmaters/ Underdrive Pullies/ Cold Air Induction with custom air box/Cross Drilled Rotors/Shorty Headers/ 1 Kenwood 800 Watt amp/ P&P PI heads/ PI intake/ crower stage 1 cams/ Trac lok 3.73:1 gears/ Block bored 30 over/ Forged crank/ Mahley rod's/ Diamond flat top piston's/ nos kit w/ 100shot and compucar purge/ Dual oil Filter relocator w/ oil cooler/ Trans cooler/ Trans shift kit/ Marauder T/C!
97qwikcat is offline  
Sponsored Links
Advertisement
 
post #4 of 15 (permalink) Old 09-12-2006, 01:42 AM
Newbie
Moderator
 
master486's Avatar
 
Join Date: Jun 2006
Location: San Diego
Age: 32
Posts: 5,650
Quote:
Originally Posted by 97qwikcat
ok so if you unplug it while it's running the car will stay the same then right?
No it shouldn't. Most cars will flat out stall if you unplug the IAC, but some the idle will drop noticeably. In either case, you shouldn't be experiencing nothing happening if you unplug the IAC.

--Chris

DirtyDog Torque Converter For Sale!!
Huge Parts Sale!!

1996 Thunderbird LX
Awaiting some tender deconstruction...
master486 is offline  
post #5 of 15 (permalink) Old 09-12-2006, 07:57 AM Thread Starter
Seasoned PostWhore
 
97qwikcat's Avatar
 
Join Date: Apr 2005
Location: Dearborn Heights MI
Age: 34
Posts: 2,176
ok then would that valve be bad or sticking?

Get in, Sit down, Shut up, Hang on
My mod's
True Duals W/ Flowmaters/ Underdrive Pullies/ Cold Air Induction with custom air box/Cross Drilled Rotors/Shorty Headers/ 1 Kenwood 800 Watt amp/ P&P PI heads/ PI intake/ crower stage 1 cams/ Trac lok 3.73:1 gears/ Block bored 30 over/ Forged crank/ Mahley rod's/ Diamond flat top piston's/ nos kit w/ 100shot and compucar purge/ Dual oil Filter relocator w/ oil cooler/ Trans cooler/ Trans shift kit/ Marauder T/C!
97qwikcat is offline  
post #6 of 15 (permalink) Old 09-12-2006, 07:48 PM
Banned, duplicate account
 
Join Date: Sep 2006
Location: Helena, Montana
Posts: 15
where exactly is the IAC? ive got a 4.6
LowLyfe83 is offline  
post #7 of 15 (permalink) Old 09-12-2006, 08:37 PM
Humble MN12 Genius
Super Moderator
 
XR7-4.6's Avatar
 
Join Date: Apr 2006
Location: Roselle IL
Posts: 16,596
Garage
Send a message via Yahoo to XR7-4.6
Quote:
LowLyfe83
where exactly is the IAC? ive got a 4.6
its kind of hard to see, its at the back of the manifold next to the plenum on the drivers side

-Matt
XR7-4.6 is offline  
post #8 of 15 (permalink) Old 09-21-2006, 02:55 PM
4th Gear Poster
 
Join Date: Jan 2003
Location: Toledo, OH
Posts: 288
Send a message via AIM to AtroXR7 Send a message via Yahoo to AtroXR7
i suppose its possible to be stuck in a "middle" position, but that should pose lots of drivability issues. typically it gets stuck open and takes the rev up over 2k. Closed, it would act like there were no valve and would probably stuggle to idle. And as mentioned... with it off, there wouldnt be enough vaccuum and the car will stall.
AtroXR7 is offline  
post #9 of 15 (permalink) Old 09-22-2006, 06:56 AM Thread Starter
Seasoned PostWhore
 
97qwikcat's Avatar
 
Join Date: Apr 2005
Location: Dearborn Heights MI
Age: 34
Posts: 2,176
I had it on the dyno an everything ran smoothly. So im thinking that the valve is fine. Still pondering why when you unplug it, it doesn't stall it stay's the same and I think another guy with the same engine and car had the same thing when it was unpluged it still ran fine.

Get in, Sit down, Shut up, Hang on
My mod's
True Duals W/ Flowmaters/ Underdrive Pullies/ Cold Air Induction with custom air box/Cross Drilled Rotors/Shorty Headers/ 1 Kenwood 800 Watt amp/ P&P PI heads/ PI intake/ crower stage 1 cams/ Trac lok 3.73:1 gears/ Block bored 30 over/ Forged crank/ Mahley rod's/ Diamond flat top piston's/ nos kit w/ 100shot and compucar purge/ Dual oil Filter relocator w/ oil cooler/ Trans cooler/ Trans shift kit/ Marauder T/C!
97qwikcat is offline  
post #10 of 15 (permalink) Old 09-28-2006, 08:15 AM Thread Starter
Seasoned PostWhore
 
97qwikcat's Avatar
 
Join Date: Apr 2005
Location: Dearborn Heights MI
Age: 34
Posts: 2,176
there's no way to clean this and try to make it work is there. It's struggling to idle now so I gotta do something

Get in, Sit down, Shut up, Hang on
My mod's
True Duals W/ Flowmaters/ Underdrive Pullies/ Cold Air Induction with custom air box/Cross Drilled Rotors/Shorty Headers/ 1 Kenwood 800 Watt amp/ P&P PI heads/ PI intake/ crower stage 1 cams/ Trac lok 3.73:1 gears/ Block bored 30 over/ Forged crank/ Mahley rod's/ Diamond flat top piston's/ nos kit w/ 100shot and compucar purge/ Dual oil Filter relocator w/ oil cooler/ Trans cooler/ Trans shift kit/ Marauder T/C!
97qwikcat is offline  
post #11 of 15 (permalink) Old 09-28-2006, 08:29 PM
4th Gear Poster
 
Join Date: Jan 2003
Location: Toledo, OH
Posts: 288
Send a message via AIM to AtroXR7 Send a message via Yahoo to AtroXR7
Ahem, i may have mistated this, unplugging the wiring will only freeze the valve in the position its at. If you unbolt it, it will immediatly stall. Even after the cleaning, mine just froze shut the other day after the car sat for 3 days. Car started and immediately stalled when it was stuck shut. Im really thinking there is no saving it totally, but its really expensive so im gonna drag this out as long as i can. BTW, there is a black paper gasket thats probably pretty worn on it, so you may wanna pick up a roll of paper gasket from autozone if you decide to unbolt it. Its very easy to trace and cut to shape.
AtroXR7 is offline  
post #12 of 15 (permalink) Old 09-29-2006, 12:01 AM
Newbie
Moderator
 
master486's Avatar
 
Join Date: Jun 2006
Location: San Diego
Age: 32
Posts: 5,650
Quote:
Originally Posted by AtroXR7
Ahem, i may have mistated this, unplugging the wiring will only freeze the valve in the position its at.
Unplugging the wiring should make the valve go to the full closed position if it's working properly and not binding/sticking. That is why engines will stall or the idle will drop if you unplug the valve.

--Chris

DirtyDog Torque Converter For Sale!!
Huge Parts Sale!!

1996 Thunderbird LX
Awaiting some tender deconstruction...
master486 is offline  
post #13 of 15 (permalink) Old 09-29-2006, 06:26 AM Thread Starter
Seasoned PostWhore
 
97qwikcat's Avatar
 
Join Date: Apr 2005
Location: Dearborn Heights MI
Age: 34
Posts: 2,176
well I managed to get a new sensor free from work but it was a little different I need to cross reference the number's and make sure it's the right one. I drove it today to work with the new one on at first it wanted to stall but I wouldn't let it. Now going into 3rd gear (I beleive) its like it's dropping into neutral.

Get in, Sit down, Shut up, Hang on
My mod's
True Duals W/ Flowmaters/ Underdrive Pullies/ Cold Air Induction with custom air box/Cross Drilled Rotors/Shorty Headers/ 1 Kenwood 800 Watt amp/ P&P PI heads/ PI intake/ crower stage 1 cams/ Trac lok 3.73:1 gears/ Block bored 30 over/ Forged crank/ Mahley rod's/ Diamond flat top piston's/ nos kit w/ 100shot and compucar purge/ Dual oil Filter relocator w/ oil cooler/ Trans cooler/ Trans shift kit/ Marauder T/C!
97qwikcat is offline  
post #14 of 15 (permalink) Old 10-03-2006, 10:03 AM
4th Gear Poster
 
Join Date: Jan 2003
Location: Toledo, OH
Posts: 288
Send a message via AIM to AtroXR7 Send a message via Yahoo to AtroXR7
Quote:
Originally Posted by master486
Unplugging the wiring should make the valve go to the full closed position if it's working properly and not binding/sticking. That is why engines will stall or the idle will drop if you unplug the valve.
thats right, spring return, im sorry. I was thinking screw controlled vavle for some reason
AtroXR7 is offline  
post #15 of 15 (permalink) Old 10-03-2006, 10:52 AM
6th Gear Poster
 
ThunderB's Avatar
 
Join Date: Jul 2002
Location: Down South
Posts: 663
You can search. There are lots of articles on it.

I've cleaned mine several times in the 150K miles I have on my car. I still have the origional IAC. I use alcohol and a Qtip, then put a light coat of oil onthe IAC bore. after cleaning.

Symptoms of a bad or dirty IAC are stalling or high idle. You may also need to check your vacuum lines.

97 T-Bird Sport: Dynomax catback, Removed silencer w/ K&N panel, DReinhart chip, Lightning AGSF12-FM1 plugs/180 stat, Tokico 1.25" dropped stance, bye bye fender gap

'79 F100 SB : 300 ci six, Hurst Mastershift 3spd floor shifter, Offenhauser intake, Holley 4 brrl, EFI manifolds, Chebbie Rockers, Summit Racing 3.50 gearset, DISO 2.5" diesel muffler and 2.5" exhaust, Its'a six?!
ThunderB is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome