Engine Emission Control

ENGINE EMISSION CONTROL

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

The gasoline engine emission control system consists of the:
- positive crankcase ventilation (PCV) system.

Typical Vehicle Emission Control Information (VECI) Decal:

The Vehicle Emission Control Information (VECI) decal shows:
- components of the emission control system.
- the correct vacuum hose routing.
- the color stripe of the vacuum hoses.

The heated PCV system uses intake manifold vacuum to ventilate the crankcase and return the fumes to the intake manifold for combustion.

The PCV valve:
- controls the amount of ventilating air and blow-by gases going to the intake manifold.
- is an integral part of the LH valve cover.
- is not serviceable.

The PCV heater element:
- heats the ventilating air and blow-by gases going to the intake manifold.