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3-76 FUEL SYSTEM (DFI)
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 Pum p 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 explo-
sive 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 O FF.
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).