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Home >> Kia >> 2005 >> Rio Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System/Fuel System >> Fuel Delivery System >> Releasing Fuel System Pressure >> Fuel Line Pressure Inspection
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Fuel Line Pressure Inspection

  1. Disconnect negative battery cable.
  2. Release fuel system pressure.
  3. Raise a vehicle.
  4. Install SST (OK2A1 131 001A) to fuel filter as shown in figure.
  5. Connect negative battery cable.
  6. Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
  7. Turn ignition switch ON.
  8. Inspect the fuel line pressure.
    Fig 1: Inspecting The Fuel Line Pressure
    G02181642Courtesy of KIA MOTORS AMERICA, INC.

    Fuel line pressure:

    46~51 psi (320~350 kPa, 3.2~3.5 kg/cm2 )

    Pressure too high:

    • Check for restricted fuel return line
    • If line is clean, replace pressure regulator

    Pressure too low:

    • Clamp return line and check if pressure rises
    • If pressure does rise, replace pressure regulator
    • If pressure does not rise, measure fuel pump maximum pressure
  9. Turn ignition switch OFF and remove jumper wire.