Vapor Vent System
WARNING: This page is about a different car, the 1995 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
System provides a vapor space above gasoline surface in fuel tank. Vapor space prevents liquid fuel from passing to the carbon canister.
Fuel vapors trapped in sealed fuel tank are vented though vapor valve assembly on top of fuel tank. Vapors are routed through a single vapor line to carbon canister in engine compartment. Vapors are stored in carbon canister until they are purged into engine during operation.