Initial Inspection and Diagnostic Overview

SPARK PLUG CABLE TEST
1. Disconnect, one at a time, each of the spark plug cables while the engine is idling to check whether the engine's running performance changes or not.

WARNING: Wear rubber gloves and rubber-soled shoes while working on the ignition system.

2. If the engine performance does not change, check the resistance of the spark plug cable, and check the spark plug itself.