Subaru 2002 IMPREZA Service Manual page 172

FUEL INJECTION (FUEL SYSTEMS)
27.Fuel Damper Valve
A: REMOVAL
1) Release the fuel pressure.
<Ref. to FU-54, RELEASING OF FUEL PRES-
SURE, OPERATION, Fuel.>
2) Remove the fuel damper valve from fuel return
line.
FUEL DAMPER VALVE
B: INSTALLATION
Install in the reverse order of removal.
EN0852
FU-70