Q: My car engine shuts off after the engine is warm.

asked by on

On January 2, Monday evening, I was coming home from work when my engine just shut off. I was able to steer into a McDonald's parking lot. I tried to start it again it started up but as I tried to drive it the engine shutoff again. I tried it again and it didn't start. After approximately 2 3 hours I started it and was able to drive home. I have driven the car only a couple of times around my neighborhood without any problems but the weather has been cold here so the engine really hasn't had a chance to warm up. Some people have told me it's probably my fuel pump

My car has 151000 miles.
My car has an automatic transmission.

Hi There, What you are describing sounds like an ignition coil pack that may be failing. Ignition coils are prone to this type of erratic functioning or heat cycling when they are beginning to fail due to the temperature fluctuations under the hood which ultimately cause them to shut down causing the car to only run after cooling down for 30-40 minutes. Ignition coils are coated with a varnish-like insulation that becomes brittle over time after being stretched then contracted repeatedly The insulation develops small fractures that open when heated and close when cooled. When open, they allow shorting of coil windings and decrease or eliminate the coil’s ability to function. This process will repeat itself continuously until the coil ultimately fails completely and must be replaced. I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your ignition system.

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. My car engine shuts off after the 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: Should I buy a new or used air conditioner compressor for my car?

Buying a used air conditioning compressor could lead to more problems. You could easily end up having to do the job twice and a new compressor is not so expensive that I would take that chance. The good news is...

Q: Is the idle air control and mass air flow sensor are related

Hello. The mass airflow sensor and the idle air control both service as inputs for the computer to make critical calculations. If the leak you are referring to is a vacuum leak, then yes, all of these components can play...

Q: Regarding to Uber Oil Change and Maintenance

Hi there. I am unaware of any maintenance services offered by Uber. However, Your Mechanic has several available technicians that can assist you with an oil change service at your home or office. Your concern is being forwarded to customer...

Related articles

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...