Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Spark Plug Wires Not Operating Properly

1. Inspect the spark plug gap. Adjust the gap as needed.
2. Inspect the spark plug wires for any obvious cuts, burns, or damage. Replace the wires as needed.
3. With the engine ON, inspect for any arcing to ground or other components. Replace the spark plug wires as needed.
4. Check the spark plug wires for proper resistance. Refer to Spark Plug Wire Resistance. Spark Plug Wire Resistance Check