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2002 GMC Sonoma 2002 Sonoma wont start

Tiny
BSTAND143
  • MEMBER
  • 2002 GMC SONOMA
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 11,700 MILES
I have a 2002 sonoma that quit while driving. I have replaced the fuel pump, fuel pressure regulator, and fuel filter. The fuel pressure is 10-15 psi with the key on and engine off. I am at my whits end. I did read your post from last october where another person had a similar issue and he was told to check the fuel pump ground. Where will I find the fuel pump ground? Any other ideas you may have will be surely appreciated.

bstand143
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Friday, January 15th, 2010 AT 11:30 AM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Your fuel pressure is way too low-shoud be 60-66psi
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Friday, January 15th, 2010 AT 3:51 PM
Tiny
BSTAND143
  • MEMBER
  • 3 POSTS
I realize that it is way too low. I am trying to determine why it is too low. Any ideas on what to check. The pump is new, the fuel filter is new, the fuel pressure regulator is new.
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Friday, January 15th, 2010 AT 3:56 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Is this a vortec CPI fuel system-if so could be the nut kit /pressure regulator leaking also the fuel pump check valve-
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Friday, January 15th, 2010 AT 4:00 PM
Tiny
BSTAND143
  • MEMBER
  • 3 POSTS
It is a 4.3 fuel injected engine. I just replaced the Fuel Pump, Fuel pressure regulator, and the fuel filter. With no results. It still doesn't start
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Friday, January 15th, 2010 AT 4:51 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Are you getting spark? If so you need to open it back up and investigate the regulator and nut kit-your're leaking pressure=somewhere
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Friday, January 15th, 2010 AT 5:20 PM

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