Subaru LEGACY 2002 Quick Reference Index page 104

EVAPORATIVE EMISSION CONTROL SYSTEM
Emission Control (Aux. Emission Control Devices)
B: FUEL CUT VALVE
The fuel cut valve is built onto the evaporation pipe of the fuel tank cap. The rising level of the fuel
in the fuel tank causes the float to move up and close the cap hole so that no fuel can enter the
evaporation line.
(1) Float
C: FUEL TANK CAP
The fuel tank cap has a relief valve which prevents development of vacuum in the fuel tank in the
event of a problem with the fuel vapor line.
When there is no problem with the fuel vapor line, the filler pipe is sealed at the portion (A) and by
the seal pressed against the filler pipe end. If vacuum develops in the fuel tank, the atmospheric
pressure forces the spring down to open the valve; consequently outside air flows into the fuel
tank, thus controlling the inside pressure.
(1) Seal
(2) Spring
A
(1)
B
(A)
(3)
EC-12
(1)
C
A: To canister
B: Valve open
C: Valve closed
(1)
(2)
(3) Valve
B2H3342D
B2H0395C