Will not stay running?

1996 CHEVROLET 3500
220,000 MILES • 5.4L • V8 • 2WD • MANUAL
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CHARLIEBENARD1
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  • 1 POST
Truck will start and run for 15 minutes or so then it will shut down and won't start again until it cools down.
Jul 20, 2023 at 8:46 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,188 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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Jul 22, 2023 at 11:17 AM
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