Much of the interior West is also forecast to see temperatures above August averages. The far eastern and western states will act as bookends to the central warmth with temperatures expected to be a bit cooler-than-average in these areas.
EVAP Canister Purge Valve. When energized, the evaporative canister purge valve allows the fuel vapor to flow from the EVAP canister to the engine. The normally closed valve is pulse width modulated by the PCM in order to precisely control the vapor flow.VAP Vent Valve. The evaporative canister vent valve not only allows the fresh outside air to the EVAP canister during the purge modes, but also allows the diagnostic to pull a vacuum on the fuel tank by closing the vent valve.
The EVAP canister and canister purge control valve are tested and replaced as an assembly. 1  Remove the EVAP canister from the vehicle. 2  Visually inspect the canister. 3  Replace it with a new one if there is any evidence of cracks or other damage. 4  Blow air into port A.5  There should be no airflow from ports B or C.he EVAP canister purge control valve is part of the EVAP canister assembly. Please refer to Component Testing, EVAP Canister for the canister purge control valve test procedure. 1  Remove the purge control valve from the vehicle. 2  Blow air into each port. 3  There should be no airflow through any ports.