Results Of Incorrect Operation

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A plugged positive crankcase ventilation (PCV) orifice or hose may cause the following conditions:
- Rough idle
- Stalling or slow idle speed
- Oil leaks
- Oil in air cleaner
- Sludge in engine
A leaking PCV orifice or hose may cause the following conditions:
- Rough idle
- Stalling
- High idle speed