Q: Why is my car stalling when reaching operating temperature?

asked by on

after reaching operating temp. and approaching a stop or being stopped. car stalls, will not start. But i let go of key and it keeps trying to turn over on its own for a couple of seconds. then stops. and wont start. after waiting for it to cool down a little while it will start again.. Please help !! what can i do to figure out what the problem is??

My car has 93000 miles.
My car has an automatic transmission.

Hello. This is a common problem on this generation of Impala. Some solutions I have seen work with this problem are replacing the mass air flow sensor or crankshaft position sensor. The mass air flow sensor relays to the computer how much air is flowing into the intake system to allow for the proper air and fuel mixture. When this isn’t working properly, this can cause it to stall. The crankshaft position sensor is a small sensor located down toward the bottom of the motor near the crank that monitors the speed of the crankshaft and relays this info to the car’s computer to help control the timing of ignition and fuel injection.

Similarly, when this is not working correctly, it can cause errors in the computer and cause the motor to stall. One other item to check would be the ignition control module. This (working with other components) monitors the ignition process after gathering data from other sensors to tell the motor when to fire. When this is malfunctioning, this can also cause the motor to stall. To have the problem scoped out in person, I recommend having an expert from YourMechanic come to your home or office to diagnose the stalling issue and follow through with correct repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 mechanics are ready to answer your question.
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. Why is my car stalling when reaching operating temperature?

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 if my car shakes and it's not the tires what else can cause the shaking?

If the tire/wheel balancing and run-out (side to side motion) have been checked and ruled out, the fault may be suspension or driveline related. Worn inner c/v joints for example, can cause a vibration while accelerating either from a stop...

Q: When I travel the first 20 miles, my temperature light rises between 3/4 and just below red

Hi, thanks for writing in. This is a cooling system problem which can be caused by a variety of things, but most commonly is related to a faulty or sticking thermostat or potentially a bad cooling fan relay causing the...

Q: does a 2009 VW New Beetle 2.5 l have a timing belt or a timing chain?

This engine uses a timing belt and not a timing chain.

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...