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Home >> Mazda >> 1986 >> 323 Base >> Repair and Diagnosis >> Engine Performance >> System >> PCV System >> System Testing >> Piston Engine Models >> 323

Piston Engine Models: 323

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With engine at normal operating temperature and key in the "OFF" position, remove ventilation hose and PCV valve from valve cover. Run engine at idle and place finger over the PCV valve inlet. Vacuum should be felt. If no vacuum is felt, replace valve. See Figure .