Engine shuts off after warming up

Tiny
ELDAWILSON
  • MEMBER
  • 2005 CHEVROLET AVALANCHE
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
Starts right up runs great until it gets warm, then it will start, but wont stay running. Help me please.
Monday, March 22nd, 2021 AT 3:01 PM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
We need to start with checking for codes. Here is a guide that will help with this:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If there is a code then we can track that down. However if there are no codes then we need to proceed with a couple of things. First we need to monitor the fuel pressure and make sure that is not dropping.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

If the fuel is still there then we need to assume we have a crank sensor issue.

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

Unfortunately this makes the most sense except for one thing. Normally when they fail due to heat then they won't allow the engine to start until they cool down.

However, at this point if nothing else, I would start with replacing the sensor. Below is the process and the relearn. Let us know what this info is and we can go from there. Thanks
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Tuesday, March 23rd, 2021 AT 3:23 PM

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