Nubira SX Hatchback L4-2.0L DOHC D-TEC MFI (1999)
Positive Crankcase Ventilation: Description and Operation
POSITIVE CRANKCASE VENTILATION SYSTEM OPERATION
A positive crankcase ventilation (PCV) system is used to provide complete use of the crankcase vapors. Fresh air from the air cleaner is supplied to the
crankcase. The fresh air is mixed with blowby gases which are then passed through a vacuum hose into the intake manifold.
Periodically inspect the hoses and the clamps. Replace any crankcase ventilation components as required.
A restricted or plugged PCV hose may cause the following conditions:
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Rough idle.
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Stalling or low idle speed.
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Oil leaks.
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Oil in the air cleaner.
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Sludge in the engine.
A leaking PCV hose may cause the following conditions:
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Rough idle.
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Stalling.
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High idle speed.
