- Improper installation of the fuel metering valve
- Low fuel supply pressure
- Obstructed fuel supply
- Obstructed fuel outlet
Improper Installation of the Fuel Metering Valve
Check for the correct installation of the fuel metering valve. A E864 Low Gas Fuel Differential Pressure will be generated if the fuel metering valve is not installed correctly.
Note: When the fuel metering valve is properly installed, the end with the electrical connector that is connected to the air system will be oriented toward the inlet of the turbocharger compressor. The opposite end of the valve is connected to the pressurized gas supply.
Ensure that the fuel metering valve is installed properly.
The fuel metering valve requires a minimum pressure of
Adjust the fuel pressure regulator in order to achieve the correct pressure.
If the fuel pressure regulator cannot be adjusted to the correct setting, repair the regulator or replace the regulator.
Check the fuel filter for restriction. Replace the fuel filter, if necessary.
Inspect the screen inside the inlet of the fuel metering valve for cleanliness. Clean the screen, if necessary.
Inspect the fuel supply lines to the fuel metering valve for obstructions. Clean the lines and make repairs, as needed.
Check the Gas Shutoff Valve (GSOV) for proper operation. Verify that the valve is fully open when the valve is energized. Verify that the GSOV does not stick in a partially open position. Repair the GSOV. Replace the GSOV, if necessary.
Inspect the piping for obstructions between the fuel metering valve and the inlet to the turbocharger compressor.
Clean the piping and repair the piping, as needed.