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 system consists of a charcoal-filled canister and the lines connecting the canister to the fuel tank, ported vacuum and intake manifold vacuum.he canister contains charcoal granules which adsorb gasoline vapor and store them temporarily until the engine intake manifold vacuum draws them off. A malfunction of the EVAP system is unlikely to cause the high fuel consumption you report. However, it may be a useful clue pointing to a fuel leak.