Car stalls

2011 HYUNDAI ELANTRA
102,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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EKINDE GILLIS
  • MEMBER
  • 1 POST
When I park for the night, I drive okay for up to 20-45 minutes, then it starts stalling until I turn it off for about 30 minutes. The car underwent a head gasket change after it overheated. We’ve put several professional scanning tools and no codes are shown. Chained the Throttle and sensor, checked the crankshaft sensor as well.
Jun 10, 2022 at 6:51 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Hi,

What you described does sound like a faulty crankshaft position sensor. If you checked it, was that done when the engine was hot and wouldn't start?

What happens is when the sensors start to fail, heat adversely affects them. There is an internal expansion of the coil and a loss of connection. Once it cools, it will run again. Also, by design, these sensors may or may not set a code.

Take a look through this link and let me know if it mirrors what you experience:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor

Also, when it stalls and won't restart, check to see if there is spark to the plugs. If the sensor is the issue, you will lose spark. Here is a link that shows how to test for spark.

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

If you have a tachometer in the vehicle, when cranking see if it moves at all.

Let me know.
Joe

Jun 11, 2022 at 1:25 PM
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