|
|
Plugged vacuum orifice tube (5) in the camshaft cover Plugged, restricted, or leaking PCV dirty air hose (2) Plugged or restricted intake manifold passage (3) Excessive crankcase pressure or blow-by, refer to Engine Compression Test Additional items to inspect: Plugged or restricted vacuum tube (4) in the camshaft cover Plugged or restricted PCV fresh air hose (6) Plugged or restricted passage in the air cleaner resonator (1) Inspect the cam cover, the oil pan, engine front cover, and other sealing areas for leaks Results of Incorrect Operation A plugged crankcase ventilation system may contribute to the following conditions: A rough idle Stalling or a slow idle speed Oil leaks Oil accumulation in the air cleaner resonator (1) Sludge in the engine A leaking hose may contribute to the following conditions: A rough idle Stalling Unstable idle speed The crankcase ventilation system has no serviceable components so no maintenance of the system DRIVE BELT CHIRPING DIAGNOSIS Diagnostic Aids The symptom may be intermittent due to moisture on the drive belt(s) or the pulleys. It may be
2006 Hummer H3 2006 ENGINE Engine Mechanical - 3.5L (L52) - H3
|