EXHAUST EMISSION CONTROL Evaporative Emission Control System Description The evaporative emission control system is used to reduce hydrocarbons emitted to the atmosphere from the fuel system. This reduction oi hydrocarbons is accomplished by activated charcoals in the carbon canisterr Fuel vapor Ilow at enema running Vacuum signal line <2 Fual "per new at engine stop Fuel fillar cup with W" he "'"7 vacuum relief valve7 Fuel vapor vmt lino q- Purga control valve Thronlo valve Carbon can is!" (Fuel tank Intak- manivold Canister purge lino SEC26A Vi Operation Inspection AT ENGINE STOP FUEL TANK AND VAPOR VENT LINE Fuel vapor from the seaIed fuel tank is led into the Refer to MA section for inspection of fuel tank carbon canister which is filled with activated and vaporventline. carbon and stroke there CARBON CANISTER PURGE DURING ENGINE OPERATION CONTROL VALVE The canister retains the vapor until the canister is 1 Disconnect rubber hose. in the line, between cleaned by air drawn through the purge line to T-connector and carbon canister at TAcon- the intake manifold. nectar, As engine speed increases, the ported vacuum rises and purge control valve opens the orifice allowing the vapor to travel through the purge line ,to the intake manifold.