Diesel Fuel Pressure Sensor Testing

Install the pressure tester to the test port when the engine is cold. Although the pressure sensor is often the cause of a p0452 or p0453 there are other possible causes. Connect picoscope channel a to the signal circuit.

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Ensure the engine is stopped.

Diesel fuel pressure sensor testing.

Turn the ignition key and then the engine and record the pressure readings both times. You will see that picoscope has displayed an example waveform and is preset to capture your waveform. 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. Glowshift tinted 7 color 30 psi fuel pressure gauge kit includes electronic sensor black dial smoked lens for diesel trucks 2 1 16 52mm 4 2 out of 5 stars 49 84 99 84.

A car with a port injected pump should yield a reading between 30 and 80 psi. If the fuel rail pressure sensor does not output the correct voltage verify the 5 volt reference is present at the sensor. To check the ground wire check for voltage by back probing the connector with it connected. It should be about 0 5 volts.

Check the fuel rail pressure sensor voltage at key on engine off. 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. Start the scope to see live data. If this sensor isn t working correctly the computer gets false information and turns on the check engine light.

Using manufacturer s data identify the output signal circuit for the fuel rail pressure sensor. Minimize the help page. Testing the fuel pressure.