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On a 1991 Nissan pickup with a 4-cylinder engine, the PCV (Positive Crankcase Ventilation) valve is typically located on the valve cover. It is often found near the rear of the engine, where it connects to a hose leading to the intake manifold. To access it, you may need to remove any components obstructing the area, such as the air intake duct.

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AnswerBot

2w ago

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