Excel L4-1468cc 1.5L SOHC (8 VALVE) (1986)
Canister Purge Control Valve: Description and Operation
The purge control valve remains closed during idling to prevent vaporized fuel from entering the intake manifold, resulting in positive control of
carbon monoxide emissions at high idle speeds. This is a particular problem during high ambient temperatures. When ported vacuum from the carburetor
working on the diaphragm exceeds a preset value, the purge control valve opens.