Test Step 3

Average value of spark plug firing voltage: greater than 15 KV with evenness of spark plug firing voltage: 5 KV or less.

^ Problems affecting all cylinders:
- Check ignition coil wires for proper installation in coil.
- Measure resistance of ignition wires.
- Replace if greater than 7000 ohms per foot.
- Wide spark plug gaps-all cylinders (usually from worn electrodes due to high mileage).