## Fuel and Emissions Systems

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

11-11

Symptom | Diagnostic Procedure | Also check for
Warming up |

1. Intake System.

   (Intake manifold, air cleaner, MAF sensor)

2. Fuel filter, Fuel Line, Fuel, Fuel Condition.
3. Glow System.

   (Glow Relay, Glow Plug)

4. Exhaust System.

   (EGR system, Turbocharger, Vacuum system)

5. Fuel Injection System.

   (Injector, Supply Pump, Common Rail)

6. ECM (ECM, Fail Safe Mode)

- Low Compression
- Contaminated Fuel
- Engine Mechanical
- Chassis Parts Error

After warm up |

1. Intake System.

   (Intake manifold, air cleaner, MAF sensor)

2. Fuel filter, Fuel Line, Fuel, Fuel Condition.
3. Exhaust System.

   (EGR system, Turbocharger, Vacuum system)

4. Fuel Injection System.

   (Injector, Supply Pump, Common Rail)

5. ECM (ECM, Fail Safe Mode)

- Low Compression
- Contaminated Fuel
- Engine Mechanical
- Chassis Parts Error

a a a