Emission Control Systems: Description and Operation

CAUTION: Do not remove any part of the engine emission control system. Operating the engine without the engine emission control system intact will reduce fuel economy and engine ventilation. This will weaken engine performance and shorten engine life.

The engine emission control system consists of:
- The Positive Crankcase Ventilation (PCV) system.
- The Exhaust Gas Circulation (EGR) system.