For 1990-2009 cars

The compressed combustion gas which escapes past the piston rings into the crankcase is known as blow-by gas. Blow-by gas contains large amounts of carbon monoxide (CO) and hydocarbon (HC). The positive crankcase ventilation (PCV) system prevents the blow-by gas from being emitted into the atmosphere. The PCV system routes the crankcase blow-by gas back into the intake system where the blow-by gas becomes part of the combustion process.

### Results Of Incorrect Operation

A plugged oil separator or hose may cause any of the following conditions:

• | A rough engine idle

• | Engine stalling or low engine idle speed

• | High engine crankcase pressure

• | Engine oil leaks

• | Engine oil in the air cleaner

• | Oil sludge in the engine

• | Engine oil consumption

• | Excessive exhaust emissions

A faulty separator or hose may cause any of the following conditions:

• | A rough engine idle

• | Engine stalling

• | High engine idle speed

• | Incorrect engine crankcase pressure

• | Excessive exhaust emissions

• | Engine oil consumption