Engine Surges
- Ensure fuel system pressure is correct.
- Ensure fuel injector operation is correct.
- Ensure sufficient spark is available at all cylinders.
- Ensure spark plugs are not worn out and are gapped properly.
- Ensure fuel is of good quality.
- Ensure fuel injector operation is correct.
- Ensure ECM has correct voltage supply and is properly grounded.
- Test coolant temperature sensor operation.