Question
What causes gasoline engine spark plug wire "arcing"?
Answer
Insulation wear and improper routing.
Explain
Arcing wires cause electromagnetic interference and misfires. CHEPQ recommends routing wires away from metal components and replacing wires with worn insulation—preventing arcing and ensuring reliable spark delivery.
Related Diagnostic Guide
To explore this topic in a broader system-level diagnostic context:
Related Guide: OBD-II, DTC & Live Data Analysis
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