buick Workshop Repair Guides

Buick Workshop Service and Repair Manuals

Sensors and Switches - Emission Control Systems > < Crankcase Ventilation System Inspection
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Positive Crankcase Ventilation: Testing and Inspection
Results of Incorrect Operation

Crankcase Ventilation System Description General Description

A plugged valve may cause the following conditions:

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Rough idle.

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Stalling or slow idle speed.

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Oil leaks.

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Sludge in engine. A leaking valve would cause:

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Rough idle.

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Stalling.

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High idle speed.

Sensors and Switches - Emission Control Systems > < Crankcase Ventilation System Inspection