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Car will not start

Tiny
MAYSFARM
  • MEMBER
  • 2008 HUMMER H3
  • 3.7L
  • 5 CYL
  • 4WD
  • AUTOMATIC
  • 210,500 MILES
On occasion after the car has been driven for a period of time and parked it will not start upon returning. However, if I wait a couple of hours the vehicle will start. What is the cause of this random shut down and then restart after a waiting period?
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Monday, May 27th, 2019 AT 8:07 AM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

This could be a problem with your vehicle's Crankshaft Position Sensor (CKP) starting to fail. When a CKP sensor is starting to go bad, it exhibits exactly what you described in your question. I have included a few links below for you to go to:

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

I have also included the location of your vehicle's CKP in the diagrams down below. Please go through these guides and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Monday, May 27th, 2019 AT 10:57 AM

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