3-90 FUEL SYSTEM (DFI)
Fuel Pressure Inspection
Be sure the battery is fully charged.
Front Seat (see Front Seat Removal in the Frame chap-
Fuel Tank Bolts (see Fuel Tank Removal in this chapter)
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 (see Fuel Tank Removal in this
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] and fuel hoses
(Special Tool: 57001-1607) [B] between the fuel supply
pipes of the fuel pump and throttle body assy.
Connect the pressure gauge [C] to the fuel pressure
Special Tools - Oil Pressure Gauge, 5 kgf/cm²: 57001-125
Fuel Pressure Gauge Adapter: 57001-1593
Fuel Hose: 57001-1607
Do not try to start the engine with the fuel hoses
Turn the ignition switch ON. The fuel pump will turn for 3
seconds, and then stop.
Do not drive the fuel pump 3 seconds or more with-
out 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.
right after Ignition Switch ON, with pump running:
Standard: 304 kPa (3.1 kgf/cm², 44 psi)
after 3 seconds from Ignition Switch ON, with pump
Standard: 280 kPa (2.9 kgf/cm², 41 psi) , residual fuel
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.