Fuel Pressure Sensor: What It Is and How It Works
The fuel pressure sensor, also known as the fuel rail pressure sensor or high-pressure sensor, is key in modern fuel systems. It checks the fuel pressure in the rail, which feeds the injectors. This info helps the Engine Control Module (ECM) or Powertrain Control Module (PCM) adjust fuel pressure and timing for better engine performance and efficiency.
Fuel pressure sensors are vital for both gasoline and diesel engines. In modern vehicles, they play a big role in keeping fuel pressures high for efficient burning. Diesel engines can reach up to 25,000 psi, while direct injection gasoline engines can go up to 2,500 psi.
The sensor always watches the fuel rail pressure and sends this info to the ECM/PCM. The control module then adjusts the fuel system in real-time. This ensures the eng...