What is the function of the rail pressure sensor?
The common rail pressure sensor is located on the fuel rail. Its function is to monitor the fuel pressure in the common rail. Sensor is used by the ECM as a part of the calculation for the % duty cycle applied to the Fuel Pressure Control Valve and Fuel Quantity Control Valve.
Where is the fuel pressure sensor?
The fuel tank pressure sensor is part of the fuel pump assembly and is mounted on top of the tank or inside the tank. It’s part of the evaporative emissions system (commonly referred to as “EVAP”) and reads pressure in the fuel system to detect evaporative leaks, such as a loose or faulty gas cap.
How do you change a fuel rail sensor?
Put on safety glasses and protective clothing. Place a small drip pan under the rail and place a towel over the port. Using a small flat screwdriver, open the valve by pushing on the schrader valve. This will bleed off the pressure in the fuel rail.
Where is the FRP sensor on the fuel rail?
The fuel rail pressure (FRP) sensor is mounted to the fuel rail on turbocharged engines. This sensor measures fuel rail pressure, sending the signal to the DME.. In the rail, the compressed fuel is stored temporarily and distributed to the high-pressure fuel injectors.
How do you take pressure off fuel rail?
Place a small drip pan under the rail and place a towel over the port. Using a small flat screwdriver, open the valve by pushing on the schrader valve. This will bleed off the pressure in the fuel rail. Note: If you do have a test port or a schrader valve, then you will need to remove the supply fuel hose to the fuel rail.
How long does it take to replace a fuel pressure sensor?
Depending on the vehicle, it may only take a few minutes to replace the sensor but there is typically a one hour minimum. If you have some mechanical experience, replacing the fuel rail pressure sensor is a good DIY candidate. Note: Do not confuse the fuel rail pressure sensor with the fuel tank pressure sensor.