IGN8 - Check Secondary Display (Continued)

Low Firing Voltage Or A Sloping Spark Line:

^ Is there consistently low spark plug firing voltage or sloping spark line in one or more cylinders?

YES -- Check for ignition problems affecting some cylinders:

- Fouled spark plug(s)

- Narrow spark plug gap(s)

- Spark plug wire(s) grounding on engine.

- Carbon tracking in cap

- Valves

- Fuel Injectors

- Compression

- Vacuum leaks


NO -- GO to IGN9. IGN9 - Check Secondary Display (Continued)