Operation CHARM: Car repair manuals for everyone.

Component Tests and General Diagnostics

A plugged valve 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 crankcase ventilation valve or hose may cause the following conditions:
- Rough idle
- Stalling
- High idle speed