1998 GMC Sonoma fuel system

1998 GMC SONOMA
102,000 MILES • 4 CYL • 2WD • AUTOMATIC
Avatar
HOOVER1
  • MEMBER
  • 1 POST
I am rebuilding this engine, we got it back in and noticed something missing on the end of the fuel rail. It is on the opposite end of where the fuel comes in. There is what appears to be a valve of some sorts that appears to be controled by vacuum, it is attached to the end of the rail about 2-3 inches from the end. The valve is still attached, but there should be something attached to the end of it, it looks like there was a hose or cap or something that should go on the end of it, because when we turn the key on to pressurize the fuel system fuel comes out of the end of it.

There isn't any hose to connect to it. I can't find any reference to it in any manual.

Please help.
Bob
Apr 4, 2008 at 8:07 PM
Advertisement
Avatar
BLACKOP555
  • ✓ASE Certified Mechanic
  • 10,386 POSTS
  • ASE Certified Mechanic
What you are describing is the fuel pressure regulator There should be a vaccum line going to it to control the fuel pressure, it should not be shooting out fuel when its on, sounds like it is bad.
Apr 4, 2008 at 8:44 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.