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Random stalling issue

Tiny
HEZMARTIN
  • MEMBER
  • 2007 CHEVROLET SUBURBAN
  • 0.6L
  • V8
  • 4WD
  • AUTOMATIC
  • 85,000 MILES
We have the SUV listed above (LTZ model) that has been in and out of the shop over 10 times within the last year for phantom stalling.

The mechanics have replaced the mass air flow sensor and throttle body and it continues to stall.

I am afraid to drive the vehicle with my children in it for fear of getting rear ended when it randomly stalls.

I don't know what to do, I certainly don't want to drive the vehicle.

Thank you for your feedback.

Heather Martin
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Wednesday, October 30th, 2019 AT 5:54 AM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Welcome to 2CarPros.

Does this only happen when the engine is warm? Also, has the crankshaft position sensor been replaced? That sensor can cause stalling when it starts going bad, but it usually only is affected when the engine is warm. Does the vehicle start right back up after stalling?

Take a look through these two links and let me know if it mirrors what you are experiencing.

https://www.2carpros.com/articles/how-a-crank-shaft-angle-sensor-works

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

Additionally, there is a common ground for all of the coils. They have been known to go bad and cause a no spark issue. Normally, it won't restart, but maybe it has a weak connection. It's just a thought at this point.

Let me know about the sensor I mentioned.

Joe
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Wednesday, October 30th, 2019 AT 7:27 PM

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