OEM Mercury Mariner Fuel Pressure Sensor

Mercury Mariner Fuel Pressure Sensor Parts and Q&A

• Pressure Sensor
  3F2Z-9G756-AC
  Q: What Safety Precautions Should Be Followed When Servicing the Fuel Pressure Sensor on the Fuel Rail on Mercury Mariner?

  A:

  Safety measures must always be followed when servicing the fuel rail pressure and temperature sensor because highly volatile fuel mixtures exist near all fuel components. Open flames and smoking activities must be forbidden from the work area. Any fuel tubes or components must be disconnected only after the fuel system pressure is relieved since the system maintains pressure even when the engine shuts off. The first step involves draining fuel system pressure and the second step calls for unclipping the battery ground wire. Remove the fuel rail pressure and temperature sensor by disconnecting its electrical connector along with its vacuum tube. Unfasten the two sensor retaining bolts. Install new O-ring seals only if necessary and use 5 Nm (44 lb-in) force when tightening the bolts during installation of the sensor. Add lubricating oil to the new O-ring seal before reversing the installation steps for completing the assembly.