Subaru Legacy 2005 Service Manual page 1561

7. Fuel Pressure
A: INSPECTION
WARNING:
Before removing the fuel pressure gauge, re-
lease the fuel pressure.
NOTE:
When the fuel pressure is out of standard, check or
replace the pressure regulator and pressure regu-
lator vacuum hose.
1) Release the fuel pressure.
<Ref. to FU(H6DO)-39, RELEASING OF FUEL
PRESSURE, PROCEDURE, Fuel.>
2) Open the fuel filler flap lid, and remove the fuel
filler cap.
3) Disconnect the fuel delivery hose and connect
fuel pressure gauge.
4) Install the fuse of fuel pump to main fuse box.
5) Start the engine.
6) Measure the fuel pressure while disconnecting
pressure regulator vacuum hose from intake mani-
fold.
Fuel pressure:
Standard: 333 — 363 kPa (3.4 — 3.7 kgf/cm
48 — 53 psi)
7) After connecting the pressure regulator vacuum
hose, measure the fuel pressure.
Fuel pressure:
Standard: 279 — 309 kPa (2.85 — 3.15 kgf/
2
cm , 40 — 45 psi)
NOTE:
The fuel pressure gauge indicates 10 to 20 kPa
2
(0.1 to 0.2 kgf/cm , 1 to 3 psi) higher than standard
during high-altitude operations.
Fuel Pressure
FU-01122
2
,
ME(H6DO)-27
MECHANICAL