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I have a 2003 mitsubishi Galant and once the vehicle warms up it will not idle, it stalls. Is this a sign of a faulty AIC module and is it possible to check. I'm not getting and check engine light.

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Mass air sensor

Posted on Oct 08, 2009

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The car hesitates when idling or stopped at light/ stop sign, and the rpm drops to zero then goes back up.


The battery was a red herring - it would not have anything to do with the problem.
Faulty spark plugs could cause a miss but probably not make the engine stall.
What you described is a classic example of a faulty idle air control valve or a dirty throttle body. The computer controls idle speed by regulating how much air enters the intake. It opens the control valve to raise idle speed when necessary.
I would check the control valve and the throttle body.

Sep 27, 2012 | 2003 Nissan Altima

1 Answer

I need to replace the idle control module. Where is the idle control module located of 2003 mitsubishi galant 2.0 liter engine?


We don't have a galant with a 2.0 engine in the USA - - the idle air control valve should be mounted on the side of the throttle body.

Aug 15, 2012 | Cars & Trucks

1 Answer

My 2003 Galant temp gauge starts at warm everytime. Is it broken?


could be faulty temp sending unit,or wire is fraid and shorting itself out.

Jun 14, 2011 | 2003 Mitsubishi Galant

1 Answer

Why my galant 92 model that the idle not stable in will up and down and sunddenly the engine shutt off.i change fuel pump,ignition coil,the spark plug, but still in that problem, pls help me to this...


Hello and welcome to FixYa!

It's common on Mitsubishi cars specially when the car ages. The problem will surely be on the MAF (mass air flow) sensor. The MAF controls the vacuum supply in the car and has connectivity on the air and fuel mixture.

If the MAF sensor is faulty, you'll have erratic idle. Sometimes will result to stalling too. The MAF sensor is located in the throttle body where the air intake tube is connected. Once replaced you'll be good.

Hope this helps and thank you for using FixYa!

May 07, 2011 | 1990 Mitsubishi Galant

2 Answers

I have a 2003 mitsubishi galant, 4 cyl. whenever i take off it goes really slow like it doesnt want to change gears. (automatic) i had the trans checked & they said it's ok. could it be a fuel...


I have a similar problem...when at a stop it jerks in hesitation sometime feeling as if it wants to stall. It also does this when accelerating from stop...it has completely stalled out once when accelerating after switching from reverse to drive, but started right away.

Feb 14, 2011 | 2003 Mitsubishi Galant

1 Answer

2004 Mitsubishi Galant sometimes struggles to start the engine & drops RPM's when I brake or the car is on a complete stop. (just replaced alternador)


Hi and welcome to FixYa!

This is a common issue on this car. You definitely have a faulty IAC (idle air control) valve. If the IAC is faulty the car is hard to start, may experience an erratic idle or just stalls when depressing the brakes. The IAC is located on the throttle body so you will need to have it replaced to resolve the issue.

Hope this helps and thank you for using FixYa! Have a good one!

Feb 11, 2011 | 2006 Mitsubishi Galant

1 Answer

2003 galant not heating properly cold air will blow but no heat


make sure first you check your anti-freeze level. one simple procedure to do is to see if both radiator hoses are the same temp after the car is warm up. if not suspect faulty thermostat.

Oct 07, 2010 | 2003 Mitsubishi Galant

1 Answer

My 2003 mitsubishi galant has turned off while driving. It has started back up about 12 hours later.


hi i have just answered a similar question to this one, try checking the idle control valve and see it needs cleaning, common fault with these vehicles..hope that helps

Aug 06, 2010 | 2003 Mitsubishi Galant

1 Answer

My 2000 saturn sl2 starts perfect when it is cold, once it is warm it idles iradically and stalls. If I cut it off for 5 or more minutes once warm it is almost impossible to start. It has to be cold.


I am not completely familiar with the Saturn car lineup, but I will offer some information for the problem at hand.

It sounds like it has to do with something called a "Throttle Position Sensor". Again, Saturn may call it something different. On some vehicles, the TPS works in conjunction with a module near the cooling (radiator) system. As the car and coolant warm up, a springloaded device inside the module is pushed up allowing it to touch electrical connections. When these nodes are touched, completing the electrical circuit, it sends the information to the TPS telling it to lower the idle speed. If the TPS is faulty, then it will idle wildly as it warms up.

This may not be the case for your Saturn, but it sounds very familiar to a problem I had with a Ford and a Toyota.

Good Luck!

Feb 16, 2010 | 2000 Saturn SL

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