Initial Inspection and Diagnostic Overview

1. Visually inspect ignition system components for:
^ Damaged or worn distributor cap and rotor
^ Damaged spark plugs
^ Improperly seated spark plugs
^ Corroded, contaminated, or carbon traced distributor cap
^ Discharged battery
^ Damaged or loose connectors
^ Damaged insulation
^ Poor coil, distributor and spark plug connections
^ Blown fuses

2. Check vehicle maintenance schedule to ensure that spark plugs and wires have been properly maintained.
3. Check spark plug wires and boots for signs of poor insulation that could cause cross firing.
4. Make sure idle speed and base timing are within specification.