Engine Emission Control

ENGINE EMISSION CONTROL

NOTE: Do not permanently remove or render inoperative any part of the vehicle emission control system including related hardware. Failure to comply may violate applicable state and federal law.

The gasoline engine emission control system consists of the PCV system.

PCV System
The PCV system:
- uses intake manifold vacuum to ventilate blow-by fumes from the crankcase.
- returns the fumes to the intake manifold for combustion.

The PCV valve:
- varies the amount of blow-by gases returned to the intake manifold based on available engine vacuum.
- prevents the entry of combustion gases backfiring into the crankcase.
- is integral to the LH valve cover.
- is heated to prevent freezing.

Evaporative Emission (EVAP) Control System Vacuum Routing

Evaporative Emission (EVAP) Control System Vacuum Routing: