FUEL SYSTEM (DFI) 3-45

Fuel Pressure Inspection

NOTE

O Be sure the battery is fully charged.

• Remove:

Seats (see Frame chapter)

Fuel Tank Bolts (see Fuel Tank Removal)

• Be sure to place a piece of cloth around the fuel supply pipe of the throttle body assembly and fuel pump.

• Remove the fuel hose.

A 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.

• Install the fuel pressure gauge adapter [A] between the fuel supply pipes of the fuel pump and throttle body assy.

• Connect the pressure gauge [B] to the fuel pressure gauge adapter.

Special Tools - Fuel Pressure Gauge Adapter: 57001-1417 Oil Pressure Gauge: 57001-125

A warning

Do not try to start the engine with the fuel hoses disconnected.

• Turn the ignition switch ON. The fuel pump will turn for 3 seconds, and then stop.

CAUTION ~~

Do not drive the fuel pump 3 seconds or more with­out the fuel in the fuel tank. If the fuel pump is driven without the fuel, it may be damaged. ^•

• Measure the fuel pressure with the engine stopped.

Fuel Pressure

right after Ignition SW ON, with pump running:

Standard: 304 kPa (3.1 kgf/cm², 44 psi)

after 3 seconds from Ignition SW ON, with pump stopped: Standard: 280 kPa (2.9 kgf/cm², 41 psi) , residual

fuel pressure)

The system should hold the residual pressure about 30 seconds.

• Start the engine, and let it idle.

• Measure the fuel pressure with the engine idling.

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Fuel Pressure (idling)

Standard: 304 kPa (3.1 kgf/cm², 44 psi)

NOTE

O The gauge hand will fluctuate. Read the pressure at the average of the maximum and minimum indications.

• If the fuel pressure is much higher than the specified, re­place the fuel pump.

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

Fuel Line Leakage

Amount of Fuel Flow (see Fuel Flow Rate Inspection)

• If the fuel pressure is much lower than specified, and if inspection above checks out good, replace the throttle body assy, or the fuel pump and measure the fuel pres­sure again.

• Remove the fuel pressure gauge and adapter.

• Install the fuel tank (see Fuel Tank Installation).

Fuel Flow Rate Inspection

NOTE

O Be sure the battery is fully charged.

A 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 fuel hose of the inside diameter 7.5 mm (0.30 in.) and a measuring cylinder.

• Remove:

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