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.
By containing fuel vapors that would otherwise be vented to the atmosphere, the charcoal canister can have a positive environmental impact. Rather than being vented to the atmosphere or absorbed and disposed of, the fuel vapors can be reintroduced to the fuel system and burnt.ather than venting a gas tank to the atmosphere, an EVAP system can allow fumes to flow into a canister that contains activated carbon and is therefore capable of adsorbing the fuel vapor.