IGN6 - Check Secondary Display (Continued)
High Firing Line:
^ Is there consistently high spark plug firing voltage in one or more cylinders?
YES -- Check for ignition problems affecting some cylinders:
- Wide spark plug gap(s) or worn electrode(s)
- Improperly installed cap or rotor
- Spark plug wire(s) are firmly connected to distributor cap or spark plug.
Check for mechanical problems affecting some cylinders:
- Compression
- Vacuum leaks
- Fuel injectors
- Valves
Go to IGN11. IGN11 - Check Spark Plug Wire Resistance
NO -- Go to IGN7. IGN7 - Check Secondary Display (Continued)