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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 229 (Engine Control System & Fuel - Hybrid (Hp2) 6.0L (LFA) - Introduction (2 Of 2)) >> Repair Instructions >> Spark Plug Wire Inspection

Spark Plug Wire Inspection

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. Correct routing of the spark plug wires, Incorrect routing may cause cross firing.
  2. Any signs of cracks or splits in the wires.
  3. Inspect each boot for any of 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 terminal, replace the wire and the component connected to the wire.

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