Your Vehicle: 2001 Ford Escort ZX2 L4-2.0L DOHC VIN 3
Vehicle » Powertrain Management » Computers and Control Systems » Description and Operation » Standard Models (Non BI-Fuel) » Positive Crankcase Ventilation System  
  Positive Crankcase Ventilation System  

PCV System

The Positive Crankcase Ventilation (PCV) System (Figure 132) cycles crankcase gases back through the engine where they are burned. The PCV valve regulates the amount of ventilating air and blow-by gas to the intake manifold and prevents backfire from traveling into the crankcase. The PCV valve should be mounted in a vertical position. On some applications, the PCV system is connected to the evaporative emission system (refer to the VECI decal).

CAUTION : Do not remove the PCV system from the engine. Removal of the PCV system will adversely affect the fuel economy and engine ventilation and result in shorter engine life.


PCV Internal Drawing

Typical PCV Vacuum Connector