fuel pressure at 90 psi

1995 PONTIAC TRANS AM
95,000 MILES • 5.7L • V8 • RWD • AUTOMATIC
Avatar
JMOCK
  • MEMBER
  • 6 POSTS
fuel pressure high. change regulator, it starts but shuts off. bleed pressure to about fifty starts and runs if keep bleeding pressure.
Feb 15, 2017 at 9:30 AM
Advertisement
Avatar
STEVE W.
  • ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
Sounds like the regulator is faulty or the return line back to the tank is blocked or both. Should be around 45-48 psi. 90 will work the pump to death.
Feb 15, 2017 at 10:10 AM
Avatar
JMOCK
  • MEMBER
  • 6 POSTS
have change pressure regulator remove return line no gas coming out of return line.
Feb 15, 2017 at 10:58 AM
Avatar
JMOCK
  • MEMBER
  • 6 POSTS
figured out fuel rail plug with dirt.
Feb 15, 2017 at 12:47 PM
Avatar
STEVE W.
  • ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
That will do it. but, I will bet it is not dirt as much as fine rust and rubber from the fuel tank and lines. I would plan on replacing or cleaning and sealing the gas tank, then flushing the lines (replace any rubber lines) and you should be okay. What you are seeing is the effect of ethanol on rubber and steel.
Feb 15, 2017 at 2:44 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.