The Fuel System Type setting selects how the ECU determines the differential pressure across the injector. Select the Fuel System Type that matches the engines setup.

Knowing the injectors differential pressure allows the ECU to calculate the change in fuel flow.

 

Fuel System Type has the following options available:

·None - No FP Correction - The fuel system pressure has no effect upon the fuel equation. The injector flow entered is used only with no pressure compensation. This option should only be used if no other suitable option is available.

·MAP Referenced - For use on a fuel system in which the fuel pressure regulator is controlled by the engines intake manifold pressure. To use this mode, the Base Fuel Pressure and Injector Rated Fuel Pressure settings must be correct.

·Returnless - For use on a fuel system where the fuel rail has no return line back to the fuel tank. Requires that the ECU has access to a correctly configured MAP sensor signal. To use this mode, the Base Fuel Pressure and Injector Rated Fuel Pressure settings must be correct.

·FP Sensor - For use on a fuel system that contains a sensor that measures the pressure in the fuel rail. Requires that the ECU has access to the correctly configured fuel pressure sensor and MAP sensor. To use this mode, the Base Fuel Pressure and Injector Rated Fuel Pressure settings must be correct. Only this mode supports a rising rate regulator.

 

NOTE: This setting is only used when the Fuel Equation Mode is set to Modelled or Modelled - Multi Fuel.