Fuel and Emissions Systems

System Descriptions (cont'd)

 11-25  

Positive Crankcase Ventilation (PCV) System

The PCV valve prevents blow-by gasses from escaping into the atmosphere by venting them into the intake manifold.

  1. BREATHER PIPE
  2. INTAKE MANIFOLD
  3. PCV VALVE
  4. PCV VALVE
  5. BLOW-BY VAPOUR
  6. FRESH AIR

Evaporative Emission (EVAP) Control System

Refer to the System Diagram to see the functional layout of the system.

EVAP Canister

The EVAP canister temporarily stores fuel vapour from the fuel tank until it can be purged back into the engine and burned (refer to the System Diagram to see the functional layout of the system).

EVAP Canister Purge Valve

When the engine coolant temperature is below 75°C (167°F), the ECM turns off the EVAP canister purge valve which cuts vacuum to the EVAP canister.