Canister Purge Control Valve: Description and Operation

Evaporative Emission System

Evaporative Emission System - Duratec Engine:

Duratec Engine

Evaporative Emission System - Zetec Engine:

Zetec Engine

Principles of Operation

Evaporative Emission (EVAP) Canister Purge Valve
The EVAP vapor management valve is controlled by the powertrain control module (PCM). The EVAP vapor management valve controls the flow of fuel vapors from the EVAP canister to the engine intake manifold during various engine operating modes. The EVAP vapor management valve is normally closed.