Question about 1999 Dodge Ram

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Idle air control valve

What makes an idle air control valve keep going bad.

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Posted on May 10, 2010

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Carbon build up in the valve portion wont let it open and close properly, most of them can be cleaned with parts cleaner and a small stiff brush, I had a service manager share this with me after he saw me purchase my second one. this little trick saved me alot of money over the seventeen year period that I owned the truck. I hope this helps you, Good luck !!!

Posted on May 10, 2010


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What is an IAC Valve

Google is your friend in such questions.

  • Idle air control actuator - Wikipedia, the free encyclopedia An idle air control actuator or idle air control valve (IAC actuator/valve) ... Idle air control actuator; MAP sensor; Mass flow sensor; Oxygen sensor; Starter motor;
  • how to tell if your iac valve is going bad - YouTube
    • BY TIMMY102345
    • 6 MIN
    2009-09-07 · Video embedded · how to tell if your iac valve is going bad timmy102345. ... #372 Better repair method Toyota Camry Idle Air Control Valve - ...
  • 4 Ways to Check an Idle Air Control Valve - wikiHow
    2015-12-11 · How to Check an Idle Air Control Valve. ... Again, an idle air control valve can have an issue or fault without triggering a check engine light. 2.

  • There are also videos in this link. How to check and fix.

  • What is an IAC Valve Bing video

    May 12, 2016 | 1992 Toyota Paseo

    2 Answers

    Idle speed too low at stop

    Hi Rich what make model an year vehicle ? Most vehicles have a IAC valve or motor - idle air control , There is a passage in the throttle body an this valve opens an closes this passage allowing more air past the throttle plate raising the idle ! This passage gets plugged by carbon an needs cleaning to restore the idle back ! Idle Air Control Valve How to clean throttle body and Idle air control valve iac There is no means for idle adjustment , the engine PCM controls It !

    Apr 03, 2015 | Cars & Trucks

    2 Answers

    2002 ford explorer 4.0 xls, shuts off when coming to a stop and also when switchin from drive to reverse. the engine also smokes at the exhaust manifold I'm guessing

    Sounds like a possible idle air control problem (IAC) The smoke probably has nothing to do with the idle problem. Possible valve cover leak??

    Feb 23, 2015 | 2002 Ford Explorer

    1 Answer

    High idle after engine is warm. nothing is sticking with linkage.1992 chev k1500 5.7

    Make sure the idle screw was not turnned causeing tps sensor to read over the spec limit, the next then is to make sure the idle air control valve is working , a bad valve will cause this problem and last is the stepper motor that controls the idle. some of these around this year used steeper idle control motors instead of idle air control valves and in turn the stepper motor is bad it will hold the throtle plate open to much causing the tps reading to be wrong triggering the engine light to come on. the steeper motor will be boltted to side of the throtlebody and theres a small arm to the throtle linkage. i will enclose a stepper motor picture and an idle air valve to show you, but this sounds like the tps is out of range due to this. the last thing is to make sure there are no vacuum leaks, spray crab cleaner around throtlebody base gasket and also the intake mounting gasket and see if the idle changes is so theres a vac leak in that area. good day. okay just did a little research and this truck does have a idle air control valve, the picture is encolsed and is screwed into throtlebody, check that and for vacuum leaks, make sure tps is good sometime it will test good when testing and go bad when it wants, you could have a bad tps and idle air control valve also.11_27_2011_9_27_54_pm.jpg

    Nov 24, 2011 | 1992 Chevrolet K1500

    1 Answer

    I have a 1987 Ford Tempo. The car has a hard time starting. When I get it start it won't Idle. You have to hold the gas pedal down and even then the car wants to surge. What do you think the problem...

    This may be as simple as a bad idle air control valve which controls the idle , it may also be a weak fuelpump, i would first have the fuel pressure tested to make sure its good, then i would clean the throtlebody with cleaner and replace the idle air valve. the engine it must not be skipping due to a sparkplug or sparkplug wire, there are many things that will cause this. you will neeed to do some checking and make sure the engine is operating good, is you have a bad idle air control valve you should be able to hold the gas pedal a little and keep the engine running after a few minutes the engine should run okay with you holding the pedal , keep in mind this is a 1987 tempo i dont know how many miles are it or if the engine is in need of work but if this is whats happening then try cleaning the throtle and replacing the iac valve. good day.

    Sep 24, 2011 | Ford Tempo Cars & Trucks

    2 Answers

    Need to adjust my idle how do i do that

    air idle control valve, I dont belive you have a ideler set screw..I do belive the problem is what I have Listed..........Best of luck

    How can I tell if I need a new air idle control valve?
    If your car has a rough idle or the idle cycles up and down, then chances are that you have a bad idle control valve. On modern vehicles, the purpose of the idle air control valve is to regulate your idle, and keep the idle smooth. The idle valve is controlled by the ECU or the computer, and when in gear the idle should be between 800 and 1000 rpm, and not in gear, between 700 and 900 rpm

    Dec 02, 2010 | 1999 Oldsmobile Alero

    1 Answer

    Idle air control valve keeps going bad

    are you using carburetor spray to clean it? Because if this chemical gets into the motor it could cause lets say you've been cleaning it properly is it working intermitantly then if it is then the one of the wires could be shorting out making it look like it not working properly. i send you good luck and hope you can trace down that wire.

    May 10, 2010 | 1999 Dodge Ram

    2 Answers


    you will need to clean the idle air control valve or replace it. Usually cleaning it will do the trick.

    Oct 20, 2009 | 1999 Ford F150 Regular Cab

    3 Answers

    I got a 94 buick regal it has the 3.8 and it stalls mainly when i breack going up to a stop sign ask many people no one can help

    The idle air control valve may be dirty with carbon and not working properly. You can try cleaning out the throttle body with two cans of throttle body cleaner, make sure you follow the instructions on the can and do not use carb cleaner. The carb cleaner is to corrosive to the gaskets used in throttle body's. Try to clean out the passage way to the idle air control valve at the throttle body. Once the throttle body has been cleaned and the instructions have been followed, you can reset the idle air control valve by turning the ignition keys to the on position for 30 seconds and then turn the keys to the off position then on for 10 seconds and then start. The engine may idle high then come down, wait for it to come down and idle for 1 min then go out for a test drive. that should fix the problem. If not try resetting the idle air control valve again. Good luck and keep me posted, most of the time it's a dirty or bad idle air control valve at the throttle body. 

    Sep 04, 2009 | Buick Regal Cars & Trucks

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