: 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 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.