Subaru Impreza 2002 Service Manual page 166

7. Fuel Pressure
A: INSPECTION
WARNING:
Before removing the fuel pressure gauge, re-
lease fuel pressure.
NOTE:
If out of specification, check or replace the pressure
regulator and pressure regulator vacuum hose.
1) Release fuel pressure. <Ref. to FU(TURBO)-53,
RELEASING OF FUEL PRESSURE, OPERA-
TION, Fuel.>
2) Open the fuel flap lid, and remove the fuel filler
cap.
3) Disconnect the fuel delivery hoses from fuel fil-
ter, and connect the fuel pressure gauge.
4) Connect the connector of fuel pump relay.
5) Start the engine.
FUEL PRESSURE
6) Measure the fuel pressure while disconnecting
pressure regulator vacuum hose from intake mani-
fold.
Fuel pressure:
Standard; 284 — 314 kPa (2.9 — 3.2 kg/cm
41 — 46 psi)
7) After connecting the pressure regulator vacuum
hose, measure the fuel pressure.
Fuel pressure:
Standard; 230 — 260 kPa (2.35 — 2.65 kg/cm
33 — 38 psi)
H2M2535
NOTE:
The fuel pressure gauge registers 10 to 20 kPa (0.1
to 0.2 kg/cm
ues during high-altitude operations.
S2M0195
EN0344
ME(STi)-27
2
, 1 to 3 psi) higher than standard val-
MECHANICAL
2
,
S2M0554
2
,
S2M0554