Evaporative Emissions System: Testing and Inspection

DIAGNOSIS AND TESTING- CRANKCASE VENTILATION SYSTEM

TESTING/CLEANING





The Crankcase Ventilation (CCV) system performs the same function as a conventional PCV system, but does not use a vacuum controlled valve.

1. Check each CCV system tube (line) (1 and 3) and the draft-tube style insert (2) for leaks, cracks, kinks or bends. Replace as necessary.
2. Disconnect each CCV tube (1 and 3).
3. Blow compressed air through each tube (1 and 3) and the draft-tube style insert (2). Check for blockage or restrictions. If cleaning is necessary, spray a soapy-type all-purpose cleaner into each component and blow out. After restriction is cleared, rinse out component with clear water. Blow water from component and install to vehicle. To prevent damage to plastic components, never spray carburetor-type cleaner into any of the plastic tubes.