Stalled while driving and will not start back up?

1999 GMC YUKON
300,000 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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JENN88
  • MEMBER
  • 1 POST
It shut off while I was driving down the road like it ran out of gas, put gas in and it want start back up. Poured gas in intake and it will start but shut right back off. Changed fuel filter.
Apr 15, 2023 at 1:24 PM
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JACOBANDNICKOLAS
  • Experienced Mechanic
  • 110,240 POSTS
Hi,

If it started when you put fuel directly into the throttle body, chances are the fuel pump has failed. You could check the fuel pressure to confirm there is an issue.

Here is a link that explains how it's done:

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

Also, the fuse may have failed or the fuel pump relay. Check fuse 11 (ECM B fuse) in the under-hood fuse box. In addition to checking the fuse, confirm there is power to and from it.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If the is good, then remove the fuel pump relay and inspect the connectors. Make sure the pins on the relay as well as where it goes into the relay/fuse box for corrosion or damage. If they are good, switch that relay with a different one in the box having the same part number. If there isn't one, here is a link that explains how to test a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Try these things and let me know what you find or if you have questions. Also, pay attention to if the fuel pump is heard when you first turn the key on. If you hear it, skip the electrical checks and focus on testing fuel pressure.

You will need a fuel pressure gauge, but most parts stores will lend one to you.

Take care,

Joe

See pics below.
Apr 16, 2023 at 12:39 PM
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