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Engine shut off while driving

Tiny
LUV2
  • MEMBER
  • 1997 GMC SIERRA
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Just put new fuel pump in. Wasn't coming on with turn of key. I straight wired to toggle switch. Worked fine for 2 weeks. Was driving truck quit running just shut off. Had excellent fuel pressure when I put new pump in. Now only have 30 pds. Of fuel pressure
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Saturday, January 30th, 2021 AT 5:55 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

Are you sure the connections are good? Have you checked to make sure nothing is kinked?

If everything is good and there are no restrictions, it sounds like the pump is bad. I realize it's basically new, but it may have failed.

Did you replace the fuel filter and the sock at the bottom of the fuel pump when you replaced the pump?

Let me know.

Joe
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Sunday, January 31st, 2021 AT 3:23 PM
Tiny
LUV2
  • MEMBER
  • 2 POSTS
I've checked everything to the letter. Replaced sending unit. Sock filter. Fuel filter. Spider injectors.
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Sunday, January 31st, 2021 AT 3:30 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,700 POSTS
Hi,

If everything is good, then it sounds like the new pump is failing. If it has power, there are no restrictions, and everything is clear, the pump is the last thing.

Let me know if I can help.

Joe
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Sunday, January 31st, 2021 AT 7:07 PM

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