Spark Plug Wire Inspection

Spark plug wire integrity is vital for proper engine operation. A thorough inspection will be necessary to accurately identify conditions that may affect engine operation. Inspect for the following conditions:

• Correct routing of the spark plug wires - Incorrect routing may cause cross-firing.
• Any signs of cracks or splits in the wires.
• Inspect each boot for the following conditions:
  • Tearing
  • Piercing
  • Arcing
  • Carbon tracking
  • Corroded terminal

If corrosion, carbon tracking or arcing are indicated on a spark plug wire boot or on a terminal, replace the wire and the component connected to the wire.