Base Engine Misfire with Excessive Oil Consumption

/ 9-4x / 2011 / 2. Engine / Basic engine, V6 / Fault diagnosis, fault symptoms / Base Engine Misfire with Excessive Oil Consumption

Cause	Correction
Worn valves, valve guides and/or valve stem oil seals	1. Inspect the spark plugs for oil deposits. Refer to Spark Plug Inspection . 2. Repair or replace as required.
Worn piston rings Oil consumption may or may not cause the engine to misfire.	1. Inspect the spark plugs for oil deposits. Refer to Spark Plug Inspection . 2. Inspect the cylinders for a loss of compression. Refer to Engine Compression Test . 3. Perform cylinder leak down and compression testing to identify the cause. 4. Repair or replace as required.

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