Exhaust Emissions System - EVAP: Operation: Notes

When engine is not running, fuel vapors formed in the fuel tank pass through a vapor separator. Those vapors that do not condense to liquid fuel are routed through vent lines to the charcoal canister where they are absorbed. 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 out through a ventilation valve and into the intake runner to be burned. The ventilation valve operates as the PCV and check valve in this system.