: The Enlightenment during the 17th â 18th century produced philosophers and scientists who focused on human reason and rational thought to solve problems and provide ethnical systems for living. Enlightenment thinkers believed in natural over supernatural forces or laws.
A purge valve is the part of the vehicle Evaporative Emission Control (EVAP). system. The EVAP system prevents fuel vapors in the fuel tank from escaping into the atmosphere.
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.