IGN7 - Check Secondary Display (Continued)
Low Spark Line:
^ Is there consistently low spark plug firing 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.
Inspect for damage.
- Carbon tracking in cap.
Check for mechanical problems affecting some cylinders:
- Compression
- Vacuum leaks
- Fuel injectors
- Valves
NO -- Go to IGN8. IGN8 - Check Secondary Display (Continued)