Base Engine Misfire with Excessive Oil Consumption. Generic Unit Repair 2003

For 1990-2009 cars only

Makes 🢒 Generic 🢒 2003 🢒 Unit Repair 🢒 Engine 🢒 Engine Controls - 4.8L, 5.3L, and 6.0L 🢒 Base Engine Misfire with Excessive Oil Consumption

Cause

Correction

Worn valves, valve guides and/or valve stem oil seals

•	Inspect the spark plugs for oil deposits. Refer to Spark Plug Inspection in Engine Controls.

•	Repair or replace as required.

Worn piston rings

Oil consumption may or may not cause the engine to misfire.

•	Inspect the spark plugs for oil deposits. Refer to Spark Plug Inspection in Engine Controls.

•	Inspect the cylinders for a loss of compression. Refer to Engine Compression Test .

•	Perform cylinder leak down and compression testing to determine the cause. Refer to Cylinder Leakage Test .

•	Repair or replace as required.