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Engine shuts off when the weather is hot

Tiny
ANTONIO_1706
  • MEMBER
  • 2000 CHEVROLET BLAZER
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 1,002,345 MILES
The engine will shut off out of nowhere when it's hot outside, but when I put it in neutral it will start again but once I put it in gear it will shut off again. It will start up right away but shuts off again. If I wait 15 to 20 minutes it will go.
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Saturday, July 2nd, 2022 AT 4:19 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,874 POSTS
Hi,

What you describe sounds like a faulty crankshaft position sensor. When they begin to fail, often they are adversely affected by heat. Do me a favor. Take a look through this link and let me know if you feel it mirrors what you experience:

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

If you do, here is a link that explains in general how one is replaced:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Also, I attached the directions specific to this vehicle below. Let me know your thoughts or if you have other questions.

Take care,

Joe

See pics below. Note: The last pic provides the relearn procedure.
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Saturday, July 2nd, 2022 AT 11:50 PM

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