Elantra GLS Sedan L4-2.0L (1999)
Positive Crankcase Ventilation Valve: Testing and Inspection
POSITIVE CRANKCASE VENTILATION VALVE
1. Remove the positive crankcase ventilation valve.
2. Insert a thin stick into the positive crankcase ventilation valve from the threaded side to check that the plunger moves.
3. If the plunger does not move, the positive crankcase ventilation valve is clogged. Clean or replace it.