A Fuel Pressure Sensor can be used with your ECU for datalogging, injector pressure differential tuning and for Engine Protection purposes. A Fuel Pressure Sensor is a powered sensor that typically has three wires; a 5V+ power wire, a signal wire to the ECU, and a Signal Ground. This sensor is generally mounted in the engines fuel rail or fuel pressure regulator, and measures the fuel pressure acting on the fuel injectors.

Using the Fuel Pressure Sensor, the ECU can calculate the Injector Pressure Differential based on the current Fuel Pressure vs Intake Manifold Pressure, taking into account the Fuel Pressure Input Type. This allows for accurate modelling of flow through the fuel injector at varying pressures both in the fuel rail and intake manifold.

Fuel Pressure Sensor Configuration

On this node, the Fuel Pressure sensor calibration can be loaded or entered manually. If you have purchased a Fuel Pressure sensor from Haltech, calibrations can be loaded directly into the calibration table by using the 'Load from File' button. Calibrations can be saved to file by using the 'Save to File' button. 

Display

This node sets the minimum and maximum values for the number and gauge displays.

Diagnostics

This node allows the enabling of high and low voltage DTCs as well as diagnostic monitoring of the operating fuel pressure.

A DTC severity can be set for the minimum and maximum voltage, which will trigger an Engine Protection level for the relevant setting.

The last setting enables the Fuel Pressure Safety system to monitor the Fuel Pressure Differential, and is used in conjunction with the settings found in the 'Fuel Tuning' node. 

Enabling this setting will display a new table called 'Differential Fuel Pressure Minimum' and this table is used as the monitored parameter. 

Differential Fuel Pressure is the pressure delta across the fuel injector from tip to tip, calculated from the Fuel Pressure Input Type, Fuel Pressure and Manifold Pressure.

DTC Delay - The total time that the detection of low fuel pressure must elapse before the ECU activates engine protection. 

Minimum RPM - The minimum engine RPM for the Fuel Pressure Safety system to activate.

Precondition - Choose between MAP, TPS, or both as a load condition for the system to operate.

Minimum MAP/Minimum TPS - Sets the threshold for the precondition chosen above.

DTC Severity - Sets the level of Engine Protection severity when the Fuel Pressure Safety system triggers.

This node allows you to assign the input for the Fuel Pressure sensor. 

Fuel Pressure Sensors use an Analog Input. Any available AVI can be used.

It is recommended to disable the Pull Up.