Diesel Fuel Pressure Sensor Testing

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Diesel fuel pressure sensor testing.

Check the fuel rail pressure sensor voltage at key on engine off. Install the pressure tester to the test port when the engine is cold. A car with a port injected pump should yield a reading between 30 and 80 psi. To check the ground wire check for voltage by back probing the connector with it connected.

Using manufacturer s data identify the output signal circuit for the fuel rail pressure sensor. You will see that picoscope has displayed an example waveform and is preset to capture your waveform. Connect picoscope channel a to the signal circuit. Minimize the help page.

Glowshift fuel pressure bleeder screw sensor thread adapter for chevy gm 6 6l duramax diesel installs to fuel filter housing includes o ring 4 7 out of 5 stars 6 7 99 7. If this sensor isn t working correctly the computer gets false information and turns on the check engine light. Turn the ignition key and then the engine and record the pressure readings both times. The fuel tank pressure sensor has the final say in telling the computer if the tank pressure is holding during a key on pressure test.

It should be about 0 5 volts. Start the scope to see live data. Ensure the engine is stopped.