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

asked by on

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.

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.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. 2003 Mitsubishi Montero Limited Stalls At Stops After Engine Is Warm

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

Get a quote

What others are asking

Q: What service should I perform on the car besides the oil and filter change?

Your vehicle should be serviced on a regular basis and different services are done at different mileages. If you are not sure of what service to do or what is needed, then I suggest you have the vehicle oil and...

Q: P1810 Pressure Manifold Fault

If you have code P1810, then this might be something wrong with the transmission control valve for the gear position sensor, or a compatibility problem between the different computers. Have a pinpoint test for the code done and see if...

Q: My 2004 mitsubishi dalmante will start but wont go into gear

Hello, thank you for writing in. Transmissions tend to show these types of issues when the transmission fluid is low, contaminated, or burnt. You should start with checking and changing the fluid first. From there look into transmission solenoids, the...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.