EVAP System Components

The EVAP system is made up of the following components:
^ The EVAP canister purge valve
^ The EVAP canister
^ The fuel fill neck/fill cap
^ The fuel tank
^ The EVAP air inlet
^ The EVAP vapor pipe
^ The EVAP vent pipe
^ The EVAP purge pipe

EVAP Canister

The EVAP canister is a sealed unit with 3 ports.

The canister is filled with carbon pellets used to absorb and store fuel vapors. Fuel vapor is stored in the canister until the control module determines that the vapor can be consumed in the normal combustion process.

EVAP Purge Valve

The EVAP purge valve controls the flow of vapors from the EVAP system to the intake manifold. This normally closed valve is Pulse Width Modulated (PWM) by the control module to precisely control the flow of fuel vapor to the engine.

EVAP Air Inlet

The EVAP air inlet filters air entering the EVAP canister.