IGN4 - Check Secondary Display (Continued)

Normal Firing Voltage:

^ Are both the evenness of the spark plug firing voltage too wide and the average value of spark plug firing voltage greater than the normal value of 28KV?

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 IGN5. IGN5 - Check Secondary Display (Continued)