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7-29
FUEL INJECTION SYSTEM
FI
NOTE:
CHECKING THE FUEL PUMP AND
PRESSURE REGULATOR OPERATION
1. Check:
S
pressure regulator operation
a. Remove the fuel tank.
Refer to “FUEL TANK” in chapter 3.
b. Disconnect the vacuum hose
1
from the
pressure regulator.
c. Connect the vacuum / pressure pump gauge
set
2
onto the vacuum hose from the pres-
sure regulator.
d. Connect the fuel pressure gauge
3
and
adapter
4
onto the fuel hose.
Vacuum / pressure pump gauge
set
90890-06756
Pressure gauge
90890-03153
Adapter
90890-03176
e. Install the fuel tank.
Refer to “FUEL TANK” in chapter 3.
f. Start the engine.
g. Measure the fuel pressure.
Fuel pressure
294 kPa (2.94 kgf/cm
2
, 2.94 bar)
h. Use the vacuum pressure pump gauge set to
adjust the fuel pressure in relation to the vac-
uum pressure as described below.
The vacuum pressure should not exceed 100
kPa (1 mmHg).
Increase the vacuum pressure
!
Fuel pressure is decreased
Decrease the vacuum pressure
!
Fuel pressure is increased
Faulty
!
Replace the pressure regulator.