Impreza 2.5 RS Coupe F4-2.5L SOHC (2000)
![background image](/subaru/impreza_2.5_rs_coupe/f4-2.5l_sohc/Page-594002.png)
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While refueling
As fuel is filled in to fuel tank, internal pressure is increased. When internal pressure overcomes atmospheric pressure, port of the vent valve is
opened, and evaporation gas is introduced into the canister through the vent line. Fuel vapor is absorbed by a charcoal in the canister and purified
air is discharged from the drain valve. When a filler gun is inserted, the shut valve closes the evaporation line.