No start issue

Tiny
CHARLES SPENCER2
  • MEMBER
  • 2001 GMC SONOMA
  • 4.3L
  • V6
  • 4WD
  • AUTOMATIC
  • 156,000 MILES
Replaced intake gaskets. Truck fired right up no problems drove for about 2 days no problems whatsoever. Pulled in the driveway truck just shut off like I turned the key off. No noise shudder or anything now it will crank but wont start. Changed fuel pump, filter. It will start right up if I put gas straight in the throttle body. But will not run. I'm stumped. Any help is appreciated.
Tuesday, May 4th, 2021 AT 7:37 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

Have you checked the fuel pressure to confirm it is within spec? If not, here is a link that shows how it is done:

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

If you look at the attachments below, they include the diagnostics for fuel system problems. Since it starts when you feed it fuel, we know it is a fuel-related issue, so I thought this may be helpful.

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below.

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Tuesday, May 4th, 2021 AT 9:16 PM

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