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 rpm.
- 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 "3.2.1 Aerated Fuel Repair" .
- If air bubbles are not present, check for improper calibration setting. Shut down the engine.
Aerated Fuel Repair
Perform the following steps 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; refer to appropriate service manual, fuel system chapter.
- Verify repair of fuel lines:
- If no air in the fuel return, refer to "18.104.22.168 Test the Engine with Repair for Aerated Fuel" .
- If air in the rule return, locate and repair. Then refer to "22.214.171.124 Test the Engine with Repair for Aerated Fuel" .
Test the Engine with Repair for Aerated Fuel
Perform the following steps to determine if the aerated fuel repair resolved the misfiring cylinder condition:
- Refer to "3.2 Aerated Fuel" for exhaust caution before preceding. Start engine.
- Run engine at 1000 rpm.
- Listen for misfiring cylinder.
- If the engine is not misfiring, no further troubleshooting is required. Shut down the engine.
- If the engine is misfiring,, shut down the engine and check for improper injector setting.
|EPA07 Series 60 DDEC VI Troubleshooting Guide - 6SE567|
|Generated on 10-13-2008|