No start issue

2001 GMC SONOMA

156,000 MILES • 4.3L • V6 • 4WD • AUTOMATIC

CHARLES SPENCER2

MEMBER
2 POSTS

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.

May 4, 2021 at 12:37 PM

JACOBANDNICKOLAS

✓Experienced Mechanic
110,240 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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Professional Diagram for 2CarPros Members
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May 4, 2021 at 2:16 PM