Fuel Pressure: Inspection

WARNING: This page is about a different car, the 2007 Subaru Outback and 2007 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Before removing the fuel pressure gauge, release the fuel pressure.

NOTE: Check or replace the fuel pump and fuel delivery line if the fuel pressure is out of the standard.

Release the fuel pressure. <Ref. to RELEASING OF FUEL PRESSURE , PROCEDURE, Fuel .>
Disconnect the fuel delivery hose from the fuel damper, and connect the fuel pressure gauge.

Fig 1: Identifying Fuel Pressure Gauge Connection
Courtesy of SUBARU OF AMERICA, INC.
Install the fuse of fuel pump to main fuse box.
Start the engine.
Measure the fuel pressure after warming up the engine.
Fuel pressure:

Standard: 339.5 - 360.5 kPa (3.5 - 3.7 kg/cm ² , 49 - 52 psi)

NOTE: The fuel pressure gauge registers 10 to 20 kPa (0.1 to 0.2 kg/cm² , 1 to 3 psi) higher than standard values during high-altitude operations.