DIGIFANT II
- Check airflow sensor flap and sensor resistance. Replace if faulty.
- Inspect intake air components for leaking hoses, connections or cracks. Repair as required.
- Test intake air preheating system. Replace faulty components as required.
- Check fuel system and control system pressure. Replace pressure regulator if necessary.
- Ensure vacuum hoses are not disconnected or damaged.
- Ensure electrical harness connectors and wires are not broken or loose.
- Check cold start valve for leaking (engine warm).
- Check coolant temperature sensor operation.
- Check Oxygen (O2) sensor voltage output.