Checking The Fuel Pump And Pressure Regulator Operation - Yamaha YZF-R7 Owner's Service Manual

ELECTRONIC FUEL INJECTION
CHECKING THE FUEL PUMP AND
PRESSURE REGULATOR OPERATION
1. Check:
6 - 14
• pressure regulator operation
a. Remove the fuel tank and air filter
case cover.
Refer to "FUEL TANK AND AIR FIL-
TER" in chapter 3.
b. Disconnect the nagative pressure
hose 1 from the pressure regulator
at the joint.
c. Disconnect the injector fuel pipe 3 2
from the fuel distributor.
d. Connect the mity vac 3 onto the neg-
ative pressure hose from the pressure
regulator.
e. Install the pressure gauge 4 and
adapter 5 with the washers and
injector fuel pipe 3 onto the fuel dis-
tributor.
Mity vac
90890-06756
Pressure gauge
90890-03153
Adapter
90890-03151
Adapter
30 Nm (3.0 m • kg, 22 ft • lb)
f. Install the fuel tank.
Refer to "FUEL TANK AND AIR FIL-
TER" in chapter 3.
g. Start the engine.
h. Measure the fuel pressure.
Fuel pressure
250 ~ 260 kPa
(2.5 ~ 2.6 kgf/cm
35.6 ~ 37.0 psi)
EFI
2
,