To determine if aerated fuel is causing the cylinder to misfire, perform the following steps:
- Disconnect the fuel line return hose from the fitting located at the fuel tank.
- Place the opened end of fuel line into a suitable container.
- Start the engine.
- Run the engine at 1000 r/min.
- Visually check to see if air bubbles are rising to the surface of the fuel within the container.
- If air bubbles are present; refer to "16.2.1 Aerated Fuel Repair" .
- If air bubbles are not present, check for improper calibration setting. Shut the engine down, refer to "16.3 Improper Injector Calibration Setting (DDEC III Engines Only)" .
Aerated Fuel Repair
Perform the following for air in fuel repair:
- Shut down engine.
- Tighten all fuel line connections between fuel tank and fuel pump; refer to OEM guidelines.
- Visually inspect all fuel lines between fuel tank and fuel pump for leaks.
- Replace any damaged components.
- Verify repair of fuel lines; refer to "126.96.36.199 Test the Engine with Repair for Aerated Fuel" .
Test the Engine with Repair for Aerated Fuel
Perform the following to determine if the aerated fuel repair resolved the misfiring cylinder condition:
- Start engine.
- Run engine at 1000 r/min.
- Listen for misfiring cylinder.
- If the engine is not misfiring, no further troubleshooting is required. Shut down the engine.
- If the engine is misfiring, check for improper injector setting. Shut down the engine; refer to "16.3 Improper Injector Calibration Setting (DDEC III Engines Only)" .
|Series 50 Service Manual - 6SE50|
|Generated on 10-13-2008|