Will not stay running?

Tiny
CHARLIEBENARD1
  • MEMBER
  • 1996 CHEVROLET 3500
  • 5.4L
  • V8
  • 2WD
  • MANUAL
  • 220,000 MILES
Truck will start and run for 15 minutes or so then it will shut down and won't start again until it cools down.
Thursday, July 20th, 2023 AT 8:46 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
It sounds like the fuel pump is going out, when it won't start will it run on starting fluid? Also, can you hear the fuel pump in the tank run? Also, it could be the engine coolant sensor that shorts out when hot. Please go over this guide and let me know:

https://www.2carpros.com/articles/why-does-my-car-engine-stall-when-hot-and-how-can-i

Also go over this guide as well:

https://www.2carpros.com/articles/car-not-running-advanced

Here is the location of the sensor and a generic guide to help you step by step with instructions in the diagrams below to show you how on your car:

https://www.2carpros.com/articles/coolant-temperature-sensor-cts-replacement

Check out the images (below). Please let us know how it goes
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Saturday, July 22nd, 2023 AT 11:17 AM

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