Crankcase Ventilation System Inspection/Diagnosis. Pontiac Bonneville 2004

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2004 🢒 Bonneville 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Crankcase Ventilation System Inspection/Diagnosis

Concern

Action

External oil leak

Inspect for any of the following conditions:

•	Plugged positive crankcase ventilation (PCV) orifice tube

•	Plugged or kinked PCV hoses

•	Damaged or incorrectly installed PCV hoses

•	Excessive crankcase pressure

Rough Idle

Inspect for any of the following conditions:

•	Plugged PCV orifice tube

•	Plugged or kinked PCV hoses

•	Leaking or damaged PCV hoses

Stalling or slow idle speed

Inspect for any of the following conditions:

•	Plugged PCV orifice tube

•	Plugged or kinked PCV hoses

•	Leaking or damaged PCV hoses

High idle speed

Inspect for a leaking or damaged PCV hose.

Sludge in the engine

Inspect for any of the following conditions:

•	Plugged PCV orifice tube

•	Plugged or kinked PCV hoses