FUEL SYSTEM (DFI) 3-75

Fuel Line

•Start the engine, and let it idle.

•Measure the fuel pressure with the engine idling.

Fuel Pressure (idling)

Standard: 310 kPa (3.2 kgf/cm², 46 psi)

NOTE

○The gauge needle will fluctuate. Read the pressure at the average of the maximum and minimum indications.

If the fuel pressure is normal, the fuel circulation system (fuel pump, pressure regulator, and oil passage) is no faults. Check the DFI electronic control system (injectors, sensors, crankshaft sensor, and ECU).

If the fuel pressure is much lower than specified, check the following:

Fuel Pump Inlet Hose Clogging

Fuel Line Leakage

Fuel Pump Operation (check the sound of the pump) Amount of Fuel Flow (see Fuel Flow Rate Inspection) If the fuel pressure is much higher than specified, check the following:

Delivery Pipe Clogging

• Injector Clogging

•Remove the fuel pressure gauge and adapter. Install the fuel tank (see Fuel Tank Installation).

Fuel Flow Rate Inspection

NOTE

○Be sure the battery is fully charged.

WARNING

Gasoline is extremely flammable and can be explosive under certain conditions. Make sure the area is well-ventilated 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, and engine stop switch OFF.

•Wait until the engine cools down.

•Prepare a plastic hose of the inside diameter 7.5 mm

•(0.30 in.) and a measuring cylinder.

Remove the fuel tank bolt (see Fuel Tank Removal).

3-76 FUEL SYSTEM (DFI)

Fuel Line

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

•Be sure to place a piece of cloth around the fuel pump

•outlet hose.

Remove the fuel pump outlet hose [A] from the fuel pump

[B]and the delivery pipe [C] (see Fuel Pump Removal). Front [D]

WARNING

Be prepared for fuel spillage; any spilled fuel must be completely wiped up immediately.

When the fuel hose is disconnected, 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.

•Connect the plastic hose [A] to the fuel pump outlet pipe.

•Secure the plastic hose with a clamp [B].

•Run the other side of the plastic hose into the measuring cylinder [C].

Front [D]

WARNING

Wipe off spilled out fuel immediately.

Be sure to hold the measuring cylinder vertical.

•Temporarily instal the fuel tank and close the fuel tank

•cap.

With the engine stopped, turn the ignition switch ON. The fuel pump should operate for 3 seconds, and then should stop. Repeat this several times until the plastic hose is filled with fuel.

CAUTION

Do not drive the fuel pump without the fuel in the fuel tank.

•Measure the discharge for 3 seconds with the plastic hose filled with fuel.

○Repeat this operation several times.

Amount of Fuel Flow

Standard: 67 mL or more for 3 seconds

If the fuel flow is much less than the specified, check the battery condition (see Electrical System chapter). If the

•battery is good, replace the fuel pump.

After inspection, install the fuel tank. (see Fuel Tank In-

•stallation).

Start the engine and check for fuel leakage.