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.
EVAP Monitor. The Evaporated Emissions system is designed to prevent the vehicle fuel system from emitting unburned hydrocarbons to atmosphere. It does this by the simple expedient of subjecting the petrol tank to vacuum through a carbon vapour store, which collects the evaporated fuel and stores it.he EVAP system has its own Electronic Vacuum Control valve, similar to that used on the EGR system, built into the Canister Purge Valve CANP,) mounted down on the offside engine bay. This connects a pipe to the EVAP Canister, a plastic container mounted near the petrol tank.