1993 Saturn SL1 Fuel Pressure leaking down

1993 SATURN SL1
225,000 MILES • 4 CYL • FWD • MANUAL
Avatar
VTSI MECH
  • MEMBER
  • 2 POSTS
I have replaced the fuel pump, the fuel filter and swapped out the Throttle Body with one that ran well on another car but cannot seem to get the fuel pressure to go above 28 psi and it goes away immediatly after the engine stopps running. Any ideas?
Apr 7, 2009 at 9:29 AM
Advertisement
Avatar
MASTERTECHTIM
  • CERTIFIED EXPERT
  • 4,750 POSTS
crimp the return line to the tank and if pressure still is low then you will take a closer look inside the tank for fuel loss
Apr 7, 2009 at 8:34 PM
Avatar
VTSI MECH
  • MEMBER
  • 2 POSTS
pinched off the return line and pressure dropped just the same-almost sounds like i can hear fuel running in the throttle body when the pump is on
Apr 8, 2009 at 9:47 AM
Advertisement
Avatar
MASTERTECHTIM
  • CERTIFIED EXPERT
  • 4,750 POSTS
the problem is in the tank. the loss is most likely between fuel pump and sender unit or the sending unit itself. double check that you have 12 volts and a good ground at top of fuel pump sender. also look at connector inside fuel sender for melted terminals.
Apr 8, 2009 at 3:56 PM