Misfire Or Rough Running

Misfire or rough running

Diagnostic Procedure:

1. Troubleshoot the injector control module circuit. Injector Control Module Circuit Troubleshooting

2. Replace the fuel filter A element. Fuel Filter A Element Replacement

3. Replace the fuel filter B element. Fuel Filter B Element Replacement

4. Troubleshoot the fuel shut-off solenoid valve 1/fuel shut-off solenoid valve 2 circuit. Testing and Inspection

Also check for:

- Clogged injector
- Fuel contamination
- Manual shut-off valve problems