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Idle air control valve IAC?

Tiny
BOODAO10
  • MEMBER
  • 2002 DODGE DURANGO
On this car I was told that I need to replace my idle air control valve. What I would like to know is if I need to have it recoded after I replace this part?
Thursday, April 29th, 2010 AT 10:20 PM

22 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
The idle air control motor is located on the throttle body and once it is replaced the vehicle's computer should automatically detect it, no programming needed. Here is a guide to help walk you through the steps and a diagrams below to show you where the IAC valve is on your car.

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Check out the diagrams (Below). Please let us know what happens.
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Thursday, April 29th, 2010 AT 10:39 PM
Tiny
BCARADINE
  • MEMBER
  • 1 POST
  • 2002 DODGE DURANGO
  • V8
  • 2WD
  • AUTOMATIC
  • 133,300 MILES
I have a 2002 dodge durango and sometimes when i'm at the stop light the car will cut off I so I went to dodge and they told me that my battery had a dead cell and not enough volts were going to the computer and also to change my spark plugs and change my idle air control I replaced all of the parts and I still have the same problem
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
THe only part that makes sense is the idle air control valve. Regardless, if it is still doing it, have you checked for vacuum leaks?
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
JOSH 85
  • MEMBER
  • 24 POSTS
  • 1999 DODGE DURANGO
  • 152,000 MILES
Put a new one in now it wont idle right does good while running put when shut off idles to low and dies
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
Hi this is done with a scanner there are no manual adjustments
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
JOSH 85
  • MEMBER
  • 24 POSTS
But old idle sensor back on does good at times [idles at 800 rpm] but goes from 800 to 1100 then back down. Some times when you let it set for a day or two it starts up fine then dies if you dont keep your foot on the gas for about a minute. The only code is idle air control system. Can you help
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
Hi yes it certainly seems to be an iac sensor. If you look inside the bottom of the sensor the end that goes inside the throttle body. Can you see any carbon that may be stopping pintle to fully retract. If so you can clean this with some carb kleen. Or replace the iac sensor
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
JOSH 85
  • MEMBER
  • 24 POSTS
There is no dirt in it put a new one on it but it would idle to high [1100 rpm] all time with engine hot or cold
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
Try this with new one on truck normal temp eng idleing unplug sensor and plug back in while it is running the new sensor has to be reconized by the pcm in order for it to relearn the desired idle.
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
JOSH 85
  • MEMBER
  • 24 POSTS
I did it did fine till shut it off started it back it would not idle
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
Let me see if I can find you the relearn procedure for this
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
You can also manually trigger a relearning procedure. If you disconnect the cables leading to your vehicle's battery, the computer's source of power, and leave them disconnected for at least half an hour, you have essentially turned off your vehicle's computer and forced it to reboot. After the computer reboots, it will relearn your vehicle's system parameters by running a new diagnostic check as you drive.
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
RAM2209
  • MEMBER
  • 2 POSTS
  • 1999 DODGE DURANGO
  • V8
  • 4WD
  • AUTOMATIC
  • 121,123 MILES
Sometimes while driving the engine temperature will go too high. This happens when the idle speed suddenly goes to 900rpms and it stays there. Normal operanting rpms, are 600. I've replaced the idle controll valve, air temp, sensor, throtle position sensor. With no solution to my problem. Any suggestions?
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Maybe there's a problem with the coolant temperature sensor stuck in open loop mode giving fuel when not needed and raising the idle at the same time. Also check for vacuum leaks.
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
RAM2209
  • MEMBER
  • 2 POSTS
Thank you rasmataz. I will test the coolant temp, sensoer. Will post results.
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
WILLARD12
  • MEMBER
  • 1 POST
  • 1999 DODGE DURANGO
  • V8
  • 2WD
  • AUTOMATIC
99 durango stalls when the brakes are applied at red light or intersections I was told to check the iac valve and the battery
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
CUP1981
  • MEMBER
  • 133 POSTS
Both of those seem highly unlikely to me. I would say it is likely a vacuum leak from the brake booster. When you hit your brakes, the vacuum is coming from the booster and causing the SUV to stop running. Get under the hood and have someone hit the brakes as it's idling and listen for a loud hissing sound from the booster.
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
RANDY3357
  • MEMBER
  • 2 POSTS
  • 1998 DODGE DURANGO
  • V8
  • 4WD
  • AUTOMATIC
  • 170,000 MILES
Where is the idle air control valve located on a 1998 dodge durango
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Sunday, October 18th, 2020 AT 11:53 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

Here is a guide to help you step by step on how to remove it and the location of the valve below.

https://www.2carpros.com/articles/how-to-replace-an-idle-speed-control-motor-iac

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Sunday, October 18th, 2020 AT 11:54 AM (Merged)
Tiny
RDQUICK
  • MEMBER
  • 1 POST
  • 1998 DODGE DURANGO
Engine Performance problem
1998 Dodge Durango V8 Four Wheel Drive Automatic

Ok someone please confirm that this guy is trying to rip off my wife.
!998 dodge durango would not start. I am not home so she had it towed to a local garage. $60 for the tow is not a bad deal.
They called her today and told her the "Idle control motor" is bad and it will be $300 to replace it plus $60 for the towing.
I replaced this valve (I have not heard it called a motor before) about 2 years ago. The valve is $47 from NAPA and there is one plug and two screw that mount it. It is in the open on the side of the throttle body. Does $300 sound like a rip off to you or am I just not seeing this right?
Thanks
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Sunday, October 18th, 2020 AT 11:54 AM (Merged)

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