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Home >> GMC >> 1992 >> Forward Control 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 38 (Engine Controls - Remove/Install/Overhaul - 5.2L Gasoline) >> Fuel System >> Fuel System Pressure Release >> 3.9L/5.2L Engine

3.9L/5.2L Engine

WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, and 1995 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect negative battery cable.
  2. Remove the fuel tank filler tube cap to release fuel tank pressure.
  3. Remove protective cap from pressure test port on the fuel rail (Fig 1).
    4. Fig 1: Fuel Pressure Test Port - Typical
    G00486706Courtesy of CHRYSLER CORP.
    WARNING: DO NOT ALLOW FUEL TO SPILL ONTO THE ENGINE INTAKE OR EXHAUST MANIFOLDS. PLACE SHOP TOWELS UNDER AND AROUND THE PRESSURE PORT TO ABSORB FUEL WHEN THE PRESSURE IS RELEASED FROM THE FUEL RAIL.
    WARNING: WEAR PROPER EYE PROTECTION WHEN RELEASING FUEL SYSTEM PRESSURE.
  4. Obtain the fuel pressure gauge/hose assembly from fuel pressure gauge tool set 5069. Remove the gauge from the hose.
  5. Place one end of hose (gauge end) into an approved gasoline container.
  6. Place a shop towel under the test port.
  7. To release fuel pressure, screw the other end of hose onto the fuel pressure test port.
  8. After fuel pressure has been released, remove the hose from the test port.
  9. Install protective cap to fuel test port.
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