1993 Saturn SL1 Fuel Pressure leaking down

VTSI MECH

MEMBER
1993 SATURN SL1
4 CYL
FWD
MANUAL
225,000 MILES

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?

3 Replies

MASTERTECHTIM

MECHANIC
4,749 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

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Tuesday, April 7th, 2009 AT 8:34 PM

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

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Wednesday, April 8th, 2009 AT 9:47 AM

MASTERTECHTIM

MECHANIC
4,749 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.

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Wednesday, April 8th, 2009 AT 3:56 PM