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Home >> Jeep >> 2008 >> Liberty Limited, 4WD, Part Time >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> Fuel Delivery - 2.8L Diesel >> Sensor-Fuel Pressure >> Removal >> Fuel Pressure Sensor

Fuel Pressure Sensor

  1. Disconnect negative battery cable.
  2. Remove engine cover.
    WARNING: High pressure fuel spray can cause severe cuts, and is extremely flammable. Before opening any part of the high pressure fuel system, wait for a minimum of 30 seconds after turning off the engine to allow pressure to bleed down from the high pressure side of the fuel system. Otherwise severe personal injury can result when the high pressure fuel system is opened.
    WARNING: No sparks, open flames or smoking. Risk of poisoning from inhaling and swallowing fuel. Risk of injury to eyes and skin from contact with fuel. Pour fuels only into suitable and appropriately marked containers. Wear protective clothing.
    NOTE: Do allow cleaning solvent or debris to enter the fuel pressure sensor harness connector.
  3. Clean the area around the fuel pressure sensor with Mopar® Throttle Body Cleaner P/N 04897156AA or equivalent degreasing solvent and compressed air.
  4. Disconnect fuel pressure sensor electrical connector.
    WARNING: When working with parts on the high side of the fuel injection system such as the fuel rail and high pressure injector lines, slowly loosen the part to allow any residual pressure to bleed down from the high pressure side of the system.
    Fig 1: FUEL RAIL - 2.8L DIESEL
    GC0062744Courtesy of CHRYSLER LLC
    NOTE: Do not touch the connector terminals of the fuel rail pressure sensor. The internal electronic components of the sensor can be damaged.
  5. Remove fuel pressure sensor (1) from fuel rail.
  6. If the sensor is to be reused, remove the fuel rail pressure sensor sealing ring. Do not damage or gouge the fuel rail pressure sensor threads. If any gouges or cuts are present in the fuel rail pressure sensor threads, the sensor must be replaced. Otherwise, fuel leaks can occur.
    NOTE: Do not allow dirt or debris to enter the fuel rail and fuel rail solenoid threads after the fuel pressure solenoid has been removed from the fuel rail.
  7. Clean the thread and fuel pressure sensor sealing surface of the fuel rail.
  8. Use a clean plug to close off the fuel rail pressure sensor opening if the fuel pressure solenoid will not be immediately reinstalled.
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