Service Manual — page 203 of 715

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FUEL SYSTEM (DFI) 3-113
Fuel Line
                              NOTE
    ○The gauge needle will fluctuate. Read the pressure at
     the average of the maximum and minimum indications.

• Turn   the ignition switch off.
  If the fuel pressure is much higher than specified, replace
    the fuel pump because the fuel pressure regulator in the
    fuel pump have been clogged or stuck.
    If the fuel pressure is much lower than specified, check
    the following.
      Fuel Line Leakage (see Fuel Injector Fuel Line Inspec-
      tion)
      Amount of Fuel Flow (see Fuel Flow Rate Inspection)
•   After above checks, measure the fuel pressure again.
•   Remove the fuel pressure gauge, hoses and adapter.
•   Install:
      Fuel Hose (see Fuel Hose Replacement in the Periodic
      Maintenance chapter)
      Fuel Tank (see Fuel Tank Installation)
•   Start the engine and check for fuel leakage.
Fuel Flow Rate Inspection
                             WARNING
    Gasoline is extremely flammable and can be explo-
    sive under certain conditions, creating the potential
    for serious burns. Make sure the area is well venti-
    lated and free from any source of flame or sparks;
    this includes any appliance with a pilot light. Do not
    smoke. Turn the ignition switch off. Be prepared for
    fuel spillage; any spilled fuel must be completely
    wiped up immediately.

• Turn the ignition switch off.
• Prepare athefuelengine
  Wait until             cools down.
• measuring cylinder. (Special Tool: 57001-1607) and a
                    hose

    Special Tool - Fuel Hose: 57001-1607

• Open
  tank.
        the fuel tank cap [A] to lower the pressure in the

• Remove
  Removal).
           the fuel hose from the fuel pump (see Fuel Tank

○Be sure to place a piece of cloth around the fuel outlet
    pipe of the fuel pump.
                             WARNING
    Fuel is flammable and explosive under certain con-
    ditions and can cause severe burns. Be prepared
    for fuel spillage; any spilled fuel must be completely
    wiped up immediately. When the fuel hose is dis-
    connected, fuel spills out from the hose and the
    pipe because of residual pressure. Cover the hose
    connection with a piece of clean cloth to prevent
    fuel spillage.