My truck starts up fine drives fine for about five minutes then shuts off?

1991 CHEVROLET CHEYENNE
65,000 MILES
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DLOMAN
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It starts up and I only drive it for about 5 minutes before it shuts off again but every time when I start it again it run fine for another 5 minutes then shuts off again.
Sep 6, 2024 at 10:33 PM
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STRAILER
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This can be many things, can I ask if when it stalls out can you turn the key off, wait, then turn it on without cranking the engine over can you hear the fuel pump run in the tank for about 5 seconds? If so then the fuel pump should be okay and we will need to concentrate on the ignition system, I have seen the ignition module go out and cause this problem. Here is how to change it out in case you need it.

These videos can help us see what's going on:

https://youtu.be/lXLJbuAZ4CE?si=nNE3ILenuntoAY5t

And this video will help with the spark test:

https://youtu.be/baq_aEWNQ0Y?si=aedMn7QONYvuXNxw

Also, if you use starting fluid after it has stalled and it starts then we know it is a fuel problem. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.
Sep 7, 2024 at 7:53 AM