Express 3500 V8-4.8L (2007)
Ignition Cable: Testing and Inspection
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:
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 the following conditions:
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Tearing
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Piercing
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Arcing
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Carbon tracking
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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.