Engine Emission Control

Engine Emission Control - 3.5L Ti-VCT

Overview

PCV (Positive Crankcase Ventilation)

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 laws.

NOTE: The vehicle emission vacuum routing diagrams are contained in the Description and Operation subsection of the Evaporative Emissions. REFER to System Diagram Evaporative Emissions.

The engine emission control system consists of the PCV (Positive Crankcase Ventilation) system.

The PCV (Positive Crankcase Ventilation) System:
- uses intake manifold vacuum to ventilate blow-by vapors from the crankcase.
- returns the vapors to the intake manifold for combustion.

The PCV (Positive Crankcase Ventilation) System consists of the:
- crankcase ventilation tube.
- PCV (Positive Crankcase Ventilation) valve.

The crankcase ventilation tube:
- is connected to the PCV (Positive Crankcase Ventilation) valve and the intake manifold fitting.

The PCV (Positive Crankcase Ventilation) valve:
- varies the amount of blow-by vapors returned to the intake manifold based on available engine vacuum.
- mounted into the RH valve cover.

System Operation

Refer to Computers and Control Systems, Description and Operation.