Tracer L4-1589cc 1.6L SOHC (1989)
Positive Crankcase Ventilation: Description and Operation
Positive Crankcase Ventilation System
The PCV system cycles crankcase fumes created by combustion blow-by into the intake manifold, where they are burned with air/fuel mixture. The PCV
valve regulates the amount of ventilation and prevents backfire into the crankcase. A clean air vent prevents excessive vacuum from being built up in the
engine.