Fuel Pressure - Subaru 2009 IMPREZA Service Manual

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:
Check or replace the fuel pump and fuel delivery
line if the fuel pressure is out of the standard.
1) Release the fuel pressure. <Ref. to FU(H4SO)-
52, RELEASING OF FUEL PRESSURE, PROCE-
DURE, Fuel.>
2) Open the fuel filler lid and remove the fuel filler
cap.
3) Disconnect the fuel delivery hose from the fuel
damper, and connect the fuel pressure gauge.
4) Start the engine.
5) Measure the fuel pressure after warming up the
engine.
NOTE:
The fuel pressure gauge registers 10 to 20 kPa (0.1
2
to 0.2 kg/cm , 1 to 3 psi) higher than standard val-
ues during high-altitude operations.
Fuel pressure:
Standard
339.5 — 360.5 kPa
2
(3.5 — 3.7 kg/cm
Fuel Pressure
ME-03054
, 49 — 52 psi)
ME(H4SO)-27
MECHANICAL