Fuel Pressure - Subaru Legacy 2002 Service Manual

7. Fuel Pressure

A: INSPECTION
WARNING:
Before removing fuel pressure gauge, release
fuel pressure.
NOTE:
If out of specification, check or replace pressure
regulator and pressure regulator vacuum hose.
1) Release fuel pressure. <Ref. to FU-54,
RELEASING OF
OPERATION, Fuel.> or <Ref. to FU(w/oOBD)-48,
RELEASING OF
OPERATION, Fuel.>
2) Open fuel flap lid, and remove fuel filler cap.
3) Disconnect fuel delivery hoses from fuel
damper, and connect fuel pressure gauge.
4) Connect connector of fuel pump relay.
FUEL PRESSURE
S173656
S173656A10
FUEL PRESSURE,
FUEL PRESSURE,
B2M3135
B2M3136
B2M3159
5) Start the engine.
6) Measure fuel pressure while disconnecting
pressure regulator vacuum hose from intake mani-
fold.
Fuel pressure:
Standard; 284 — 314 kPa (2.9 — 3.2
2
kg/cm , 41 — 46 psi)
7) After connecting pressure regulator vacuum
hose, measure fuel pressure.
Fuel pressure:
Standard; 206 — 235 kPa (2.1 — 2.4
2
kg/cm , 30 — 34 psi)
NOTE:
The fuel pressure gauge registers 10 to 20 kPa
(0.1 to 0.2 kg/cm
values during high-altitude operations.
ME-29
2
, 1 to 3 psi) higher than standard
Mechanical
S2M0248
S2M0248