No. 1 Purge Control Valve
- Remove the air cleaner and plug the hoses of the idle compensator, thermo-sensor and reed valves. Disconnect the air vent hose from the carburetor and plug it. Warm engine to normal operating temperature and run at idle.
- Cover the bottom of the canister. Increase the engine speed slowly and make sure air is sucked into canister. If so, No. 1 purge control valve and water thermo-valve are working properly.