Fuel Evaporation System: Operation: Notes

When engine is not running, fuel vapors formed in fuel tank pass through vapor valve. Those vapors that do not condense to liquid fuel are routed through vent lines to charcoal canister where they are adsorbed. When engine is running, filtered air is drawn into the system through the air cleaner, mixed with gases and vapors that blow by the rotor and are drawn through purge valve and into intake runner to be burned. The purge valve operates as the PCV and check valve.