Subaru IMPREZA GD 2007 Series Manual page 2432

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7. Fuel Pressure
A: INSPECTION
CAUTION:
• Before removing the fuel pressure gauge, re-
lease the fuel pressure.
• Be careful not to spill fuel.
• Catch the fuel from hoses using a container
or cloth.
NOTE:
If the fuel pressure is out of specification, check or
replace the pressure regulator and pressure regu-
lator vacuum hose.
1) Release the fuel
FU(H4DOTC)-55, RELEASING OF FUEL PRES-
SURE, PROCEDURE, Fuel.>
2) Disconnect the fuel delivery hose from the fuel
damper, and connect the fuel pressure gauge.
3) Connect the connector of fuel pump relay.
4) Start the engine.
5) 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
Fuel Pressure
pressure. <Ref. to
ME-00790
FU-02334
2
, 41 — 46 psi)
ME(H4DOTC)-31
6) After connecting the pressure regulator vacuum
hose, measure the fuel pressure.
Fuel pressure:
Standard
230 — 260 kPa
2
(2.35 — 2.65 kgf/cm , 33 — 38 psi)
NOTE:
The fuel pressure gauge registers 10 — 20 kPa
2
(0.1 — 0.2 kgf/cm , 1 — 3 psi) higher than standard
values during high-altitude operations.
MECHANICAL