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

Fuel Pressure Hold Inspection

  1. Disconnect negative battery terminal.
    CAUTION: The fuel system remains under pressure when the engine is not running. Release fuel system pressure before disconnecting any fuel line to reduce the chance of personal injury or fire damage to vehicle components.
  2. Release fuel system pressure.
  3. Raise a vehicle.
  4. Install SST (OK2A1 131 001A) to fuel filter as described in figure below.
    Fig 1: Installing Service Tool
    G02181641Courtesy of KIA MOTORS AMERICA, INC.
  5. Connect negative battery terminal.
  6. Connect data link connector terminals FUEL PUMP and B+ with jumper wire.
  7. Turn ignition switch ON for 10 seconds to operate fuel pump.
  8. Turn ignition switch OFF and remove jumper wire.
  9. Inspect fuel pressure after 25 minutes.

    Fuel pressure:

    More than 25 psi (180 kPa, 1.8 kg/cm2 )

  10. If not as specified, check the following components and inspect as necessary:
    • Fuel pump
    • Pressure regulator
    • Injectors
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