EXHAUST EMISSION CONTROL Evaporative Emission Control System 2. Inhale air from the opening of the rubber hose running to the vacuum hole in the carbon canister and ensure that there is no leak. A Enos 3. If there is a leak, remove top cover from purge control valve and check for dislocated or cracked diaphragm. If necessary, replace dia- phragm kit (which is made up of a retainer, diaphragm and spring). Com Diaphrwm amimr Dilvhrngm luring %> sEczseA FUEL CHECK VALVE 1. Blow air through connector on fuel tank side. A considerable resistance should be felt at the mouth and a portion of air flow be directed toward the engine. 2. Blow air through connector on engine side. Air flow should be smoothly directed toward fud tank. . Inspection (Cont'd) 3. If fuel check valve is suspected of not beini properly functioning in steps 1 and 2 above replace. Fuel tank side c: Evaporatrvetuulow - Fresh air ow may FUEL TANK VACUUM RELIEF VALVE Remove fuel filler cap and see it functior properly. 1. Wipe clean valve housing and have it in yet mouth. 2. inhale air. A slight resistance accompanied " valve indicates that valve is in good mechanic condition. Note also that, by further inhali' air, the resistance should be disappeared wi valve clicks. 3. If valve is clogged, or if no resistance is fe replace cap as an assembled unit. Seal ring] Filler tub- neck Spring SEF7