Skip the auto shop - Our mechanics make house calls

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 1000 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

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: Car shakes when I slow down.

Hello. The imbalance of rotating parts on a car, such as your wheel and tire assemblies, is a function of speed but also "positioning". When you were traveling at a steady state rate, say 65 MPH, the suspension was clearly...

Q: Over heating but water is flowing through radiator

Hi there, there are a number of things that can cause a vehicle to overheat. The water flowing through the radiator can be a little misleading. Here is a list of possible causes: Thermostat Water pump Clogged radiator. Inside...

Q: Advice on 2009 Opel maintenance

Yes, that's the problem when you get an oddball car. The first car I've ever had was an Opel as a matter of fact, when Buick sold them. When the carburetor went out, I actually made the carburetor gasket out...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.