Subaru Legacy 2004 Service Manual page 1135

MECHANICAL
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 specification,
check or replace the pressure regulator and pres-
sure regulator vacuum hose.
1) Remove the collector cover.
2) Release the fuel
FU(H4DOTC)-40, RELEASING OF FUEL PRES-
SURE, PROCEDURE, Fuel.>
3) Open the fuel filler flap lid, and remove the fuel
filler cap.
4) Disconnect the fuel delivery hose and connect
fuel pressure gauge.
5) Remove the fuse of fuel pump from main fuse
box.
6) Start the engine.
7) Measure the fuel pressure while disconnecting
pressure regulator vacuum hose from intake mani-
fold.
Fuel pressure:
Standard: 284 — 314 kPa (2.9 — 3.2 kgf/cm
41 — 46 psi)
8) After connecting the pressure regulator vacuum
hose, measure the fuel pressure.
Fuel Pressure
pressure. <Ref. to
FU-01122
2
,
ME-00802
ME(H4DOTC)-26
Fuel pressure:
Standard: 230 — 260 kPa (2.35 — 2.65 kgf/
2
cm , 33 — 38 psi)
NOTE:
The fuel pressure gauge registers 10 to 20 kPa (0.1
2
to 0.2 kgf/cm , 1 to 3 psi) higher than standard val-
ues during high-altitude operations.
ME-00802