Section 03-08: Engine Emission Control | 1994 Mustang Workshop Manual |
Cleaning of the positive crankcase ventilation valve (PCV valve) (6A666) is not recommended. Refer to Section 00-03 for the recommended maintenance mileage interval. The positive crankcase ventilation valve should be replaced at the specified mileage intervals. Shake positive crankcase ventilation valve and carefully inspect for splits or cracks. If positive crankcase ventilation valve does not rattle or is damaged, replace positive crankcase ventilation valve.