Firebird V8-350 5.7L VIN P SFI (1996)
Evaporative Emission Control Canister: Description and Operation
Fuel Vapor Canister
The Evaporative Emission (EVAP) control system uses a 1500 cc charcoal canister to absorb fuel vapors from the gas tank.
When gasoline vapor builds enough to overcome the spring tension of the EVAP pressure control valve, the vapor will flow to the canister where it is
absorbed and stored by the charcoal. Under certain operating conditions the Powertrain Control Module (PCM) will command the purge solenoid valve
to open. This allows the vapor to flow into the intake manifold for combustion.
