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1996 GMC Sonoma

Tiny
DGIBBS
  • MEMBER
  • 1996 GMC SONOMA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 152,000 MILES
Want start unless you put gas in the plenum, wiil start and run until gas is gone. It has 45 psi gas pressure. When you can finally get it to start it idles like a new one, but when you openn the throttle it bogs. After sitting a couple of days it will not start at all. The first time you try to start it, it will sputter initially then just spin over from there on out. Any thoughts or if you have a particular question let me know. I have gotten desprate. Also, there is know engine light, it has not coded anything.

Don
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Wednesday, May 28th, 2008 AT 12:35 PM

5 Replies

Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
You should have around 65 psi of fuel pressure. That sounds like your problem. What engine do you have
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Wednesday, May 28th, 2008 AT 12:47 PM
Tiny
DGIBBS
  • MEMBER
  • 4 POSTS
4.3 the fuel lines come up from the back of the motor and into the intake right behind the plenum
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Wednesday, May 28th, 2008 AT 1:31 PM
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Sounds like a fuel pump issue to me
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Wednesday, May 28th, 2008 AT 1:38 PM
Tiny
DGIBBS
  • MEMBER
  • 4 POSTS
Good possibility, has never been changed that I know of. Do you feel its better to lift off the bed or drop the tank? Thanks so much for your input
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Wednesday, May 28th, 2008 AT 1:47 PM
Tiny
RHALL77
  • MECHANIC
  • 3,361 POSTS
Lift the bed
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Wednesday, May 28th, 2008 AT 2:27 PM

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