General System Description

Evaporative Emissions (EVAP) Control System:

DESCRIPTION
The basic Evaporative Emission (EVAP) control system used on all vehicles is the EVAP canister storage method. This method transfers fuel vapor from the fuel tank to an activated carbon (charcoal) storage device (EVAP canister) to hold the vapors when the vehicle is not operating. When the engine is running the fuel vapor is purged from the carbon element by intake air flow and consumed in the normal combustion process.