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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Mechanical - 3.6L (Ly7) - (Introduction)) >> Diagnostic Information and Procedures >> Base Engine Misfire with Excessive Oil Consumption

Base Engine Misfire with Excessive Oil Consumption

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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 - 3.6L.
  • 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 - 3.6L.
  • Inspect the cylinders for a loss of compression. Refer to Engine Compression Test .
  • Perform cylinder leak down and compression testing to determine the cause.
  • Repair or replace as required.