## Fuel and Emissions Systems

#### Symptom Troubleshooting Index (cont'd)

11-13

Symptom | Diagnostic Procedure | Also check for
Black smoke |

1. Intake System.

   (Intake manifold, air cleaner, MAF sensor)

2. Exhaust System.

   (EGR system, Turbocharger, Vacuum system)

3. BARO Sensor
4. Injection Timing System.

   (CKP Sensor, CMP Sensor, Mechanical timing)

5. Fuel Injection System.

   (Injector, Common Rail)

6. ECM (ECT Sensor, ECM)

- Engine Mechanical
- Engine Oil Quality

White smoke |

1. Intake System.

   (Intake manifold, air cleaner, MAF sensor)

2. Exhaust System.

   (EGR system, Turbocharger, Vacuum system)

3. BARO Sensor
4. Injection Timing System.

   (CKP Sensor, CMP Sensor, Mechanical timing)

5. Fuel Injection System.

   (Injector, Common Rail)

6. ECM (ECT Sensor, ECM)

Engine Mechanical

a a a