ATG 336 - GM Fuel Systems

1. Discuss engine requirements for proper combustion.
   1. Identify the four stroke cycle.
   2. Examine fuel requirements.
   3. Describe ignition characteristics.
2. Describe the basic characteristics of gasoline.
   1. Identify safety issues for fule handling.
   2. Discuss principles of distillation.
   3. Analyze gasoline composition.
   4. Identify gasoline additives.
   5. Discuss gasoline ratings.
3. Test gasoline.
   1. Demonstrate safe handling procedures for gasoline.
   2. Measure alcohol content.
   3. Check Reid vapor pressure.
   4. Test for contamination.
   5. Measure specific gravity.
4. Identify fuel delivery systems.
   1. Discuss fuel tank construction.
   2. Explain electric fuel pump operation.
   3. Identify fuel line composition.
   4. Explain fuel filter operation.
5. Perform fuel delivery component service.
   1. Remove, inspect, and reinstall a fuel tank.
   2. Test fuel pump pressure and volume.
   3. Replace a fuel pump.
   4. Disconnect fuel fittings using appropriate tools.
   5. Replace a fuel filter.
6. Explain electronic fuel injection operation.
   1. Identify internal combustion engine fuel requirements.
   2. Discuss fuel injection modes of operation.
   3. Describe fuel injector operations.
   4. Explain pressure regulator operation.
   5. Identify fuel injection related inputs.
   6. Discuss types of idle speed control.
   7. Explain throttle body operation.
7. Service electronic fuel injection components.
   1. Demonstrate fuel injector cleaning.
   2. Inspect and test fuel injectors.
   3. Inspect and test fuel pressure regulators.
   4. Remove and reinstall a fuel rail assembly.
   5. Isolate a fuel rail with shutoff valves.
   6. Remove, inspect, and reinstall a throttle body.
   7. Remove, inspect, and reinstall air induction components.
   8. Check for vacuum leaks.
   9. Perform an idle speed control functional test.
   10. Use a scan tool to view data and command outputs.
8. Discuss exhaust and evaporative emissions.
   1. Define hydrocarbon emissions.
   2. Examine carbon monoxide emissions.
   3. Discuss oxides of nitrogen emissions.
   4. Examine carbon dioxide emissions.
   5. Discuss oxygen emissions.
   6. Describe state and federal emission laws.
9. Identify emission control devices.
   1. Discuss catalytic converter operation.
   2. Describe positive crankcase ventilation (PCV) systems.
   3. Explain the principles of exhaust gas recirculation (EGR).
   4. Examine evaporative emission control.
   5. Define secondary air injection.
10. Service emission control systems.
    1. Test catalytic converter efficiency and exhaust system integrity.
    2. Measure exhaust back-pressure.
    3. Perform a PCV functional test.
    4. Inspect and test EGR systems.
    5. Inspect and test evaporative emission components for leaks and operation.
    6. Inspect and test secondary air injection system operation.
    7. Determine necessary repairs.