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gmc Workshop Repair Guides


Savana 3500 V8-4.8L (2009)

Maintenance > Tune-up and Engine Performance Checks > Ignition Cable > Component Information > Testing and Inspection

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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.

Maintenance > Tune-up and Engine Performance Checks > Ignition Cable > Component Information > Testing and Inspection

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