Q: 2003 Mitsubishi Montero Limited Stalls At Stops After Engine Is Warm

asked by on June 30, 2017

When the car is warm and has been driving for a bit (usually after an 25-30 minute journey) the car will stall when it's idling or coming to a stop at stop signs. It's done this 4-5 times in the last few days. I've had the throttle body cleaned but this didn't do the trick.

My car has 105000 miles.
My car has an automatic transmission.

Idle Control Valve Replacement $147.54 - $995.01 Get a Quote

What you are describing sounds like a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine at low speeds and at idle. This valve is controlled by the vehicle’s computer and will adjust idle speed based upon other measurements such as engine temperature, intake air temperature and electrical system load or voltage. This is also an important function when starting the motor as it allows the motor to run and idle on it’s own once the motor fires. When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed with the help of the idle air control valve making the transition from a higher RPM back down to idle speed while adjusting the air/fuel ratio constantly to allow this to happen smoothly. When the engine RPM drops below the normal range of about 800 RPM, this often times will cause the engine to stall indicating a dirty or faulty idle air control valve. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your vehicle.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $65/hr

What others are asking

Lost my transponder key. if i replace my ignition.cylinder do i need to program the new transponder key? 2003 Mitsubishi Galant

Hello - yes, if you do not have at least 2 keys that are already "recognized" by the transceiver, you must have the new keys programmed at a Mitsubishi service center or locksmith equipped with the proper equipment. If you...

I have a 2004 Pontiac bonneville, and air blows cold on the passengers side of the car, but not on the drivers side. Any ideas?

Hi there. There is a blend door that keeps the air blowing on the cold and hot sections separate. The blend door maybe stuck between the evaporator and the heater core causing the temperature difference. Also, the air duct on...

How much does it cost to teplace fuel injector in 2003 ford ranger, is it something i could do myself

Hi...the Trouble Code that sets if a fuel injector malfunctions does not provide a diagnostic identifying the cause of the injector failure. Consequently, the injector itself has to be directly tested. You could, for example, have a situation where the...

Po741 code

Check to be sure that the transmission fluid level is correct, especially that the level is not too high or low. Also, check the condition of the fluid. Apart from that, the list of "typical" causes of P0741 includes: Faulty...

Screeching noise from front wheel area when i turn the wheel

This loud screeching is going to be from the tie rod end or the lower ball joints. You can put your hand on the joints you suspect and have the steering move back and forth to see what one of...

Replaced a clutch slave cylinder now having trouble bleeding it

Hi, thanks for writing in. In order to bleed a slave cylinder properly, it should be bench bleed just like a master cylinder. The best way to do this is to secure the slave cylinder into a voice connect plastic...

FUEL WONT GO IN TANK AND AUTO NOZZLE TRIPS

You most likely have a fuel filler nozzle that has an outer hose with an outer hose in it. If the inner hose comes off of its mounting at the inlet of nozzle then it will restrict the fuel trying...

when under load the 2003 3.8 v6 mustang doesnt accelerate and the transmission feels like its slipping

If the transmission clutches are slipping, that is an internal mechanical fault that typically requires re-building. If the issue is in engine controls though, other common causes of loss of power include plugged fuel injectors (all should be removed from...

Overheating and hissing

You stated your coolant was about halfway. It's an important detail to know where you are checking your coolant level. Are you checking in the coolant overflow jug, or in the radiator after you remove the radiator cap. Also, you...

Related articles

A Buyer’s Guide to the 2012 Mitsubishi Outlander
The The smaller size and aggressive styling make the 2012 Mitsubishi Outlander a great choice for those who want an SUV, but don’t want to deal with some of the large behemoths available. With numerous tech options and all-wheel drive...
A Buyer’s Guide to the 2012 Mitsubishi Galant
If If you’re in the market for a midsize sedan and want the best price possible, you may be thinking about visiting a Honda or Toyota dealership. Before you do, check out the 2012 Mitsubishi Galant. Key Features Considering how...
A Buyer’s Guide to the 2012 Mitsubishi Lancer
If If you’re looking for a compact that delivers a sporty driving experience, the 2012 Mitsubishi Lancer just might be the right car for you. With a variety of models to choose from, including both a hatchback and high-performance option,...