Technician A says a defective PCV valve may cause rough idle operation. Technician B says the PCV system depends upon a properly sealed engine to perform correctly. Who is correct?

Question

Quizplus · Accepted Answer

Both technicians are correct. A defective PCV (Positive Crankcase Ventilation) valve can indeed cause rough idle operation by disrupting the engine's air-fuel mixture. Technician B is also correct because the PCV system relies on a properly sealed engine to maintain the correct pressure and function effectively.

Technician a Says a Defective PCV Valve May Cause Rough