Evaporative Emission Control Canister: Description and Operation

EVAP Canister:

The EVAP canister mounts to a bracket on top of the fuel tank in the rear of the vehicle. The vacuum and vapor tube connect to the top of the canister.

All vehicles use a sealed, maintenance free, evaporative (EVAP) canister. Fuel tank pressure vents into the canister. The canister temporarily holds the fuel vapors until intake manifold vacuum draws them into the combustion chamber. The Powertrain Control Module (PCM) purges the canister through the proportional purge solenoid. The PCM purges the canister at predetermined intervals and engine conditions.