E 350 1 Ton Van V10-6.8L VIN S (1997)
Positive Crankcase Ventilation: Description and Operation
OPERATION
The PCV system uses intake manifold vacuum to ventilate the crankcase and return the fumes to the intake manifold for combustion.
DESCRIPTION
The PCV valve:
- Controls the amount of ventilating air and blow-by gases going to the intake manifold.
- Prevents a backfire from reaching the crankcase.
