IGN5 - Check Secondary Display (Continued)

^ Is the evenness of the spark plug firing voltage too wide and the average value of spark plug firing voltage greater than normal?

YES -- Problems affecting all cylinders:
- CHECK coil wire for proper installation in coil and distributor cap.
- CHECK for wide spark plug gaps at all cylinders, (usually from worn electrodes due to high mileage).
- INSPECT cap and rotor for problems causing excessive cap-to-rotor gap.
- Go to IGN11. IGN11 - Check Spark Plug Wire Resistance

NO -- Go to IGN6. IGN6 - Check Secondary Display (Continued)