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Fuel Rail Pressure Sensor

Fig 1: Fuel Rail Pressure Sensor
GJ0009746Courtesy of JAGUAR CARS, INC.

The fuel rail pressure sensor is located on top of the fuel rail adjacent to the fuel inlet. The fuel rail pressure sensor measures the pressure of the fuel in the fuel rail. This input is then used by the FPDM to control the amount of fuel delivered to the fuel rail. The fuel rail pressure sensor is a pressure transducer device. A vacuum pipe connects to the intake manifold for manifold pressure. The ECM receives a voltage from the FRP sensor which is proportional to the fuel pressure in the fuel injection supply manifold.

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