Spark Plug Wire Inspection
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. 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 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.