Checking The Fuel Pressure - Yamaha 2009 Diversion XJ6S Service Manual

the portions of the throttle valve shafts be-
tween the throttle bodies.
e. Remove the carbon deposits from the inside
of each throttle body in a downward direction,
from the engine side of the throttle body to
the air filter case side.
ECA2S31069
NOTICE
Do not use a tool, such as a wire brush, to
G
remove the carbon deposits; otherwise, the
inside of the throttle bodies may be dam-
aged.
Do not allow carbon deposits or other for-
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eign materials to enter any of the passages
in each throttle body or in the space be-
tween the throttle valve shaft and the throt-
tle body.
f. After removing the carbon deposits, clean the
inside of the throttle bodies with a petro-
leum-based solvent, and then dry the throttle
bodies using compressed air.
g. Make sure that there are no carbon deposits
or other foreign materials in any of the pas-
sages "a" in each throttle body or in the space
"b" between the throttle valve shaft and the
throttle body.
a
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3. Check:
Fuel passages
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Obstructions → Clean.
MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
a. Wash the throttle bodies in a petroleum-
based solvent.
ECA2S31070
NOTICE
Do not use any caustic carburetor cleaning
solution.
b. Blow out all of the passages with com-
pressed air.
LLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLL
4. Check:
Fuel pulsation damper
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Cracks/damage → Replace the fuel rail as-
sembly.
ECA4S81002
NOTICE
Do not adjust the fuel pulsation damper.
EAS4S81043

CHECKING THE FUEL PRESSURE

1. Check:
Fuel pressure
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MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
a. Remove the seat.
Refer to "GENERAL CHASSIS" on page 4-1.
b. Disconnect the fuel hose.
EWA4S81015
WARNING
Cover fuel hose connections with a cloth
when disconnecting them. Residual pres-
sure in the fuel lines could cause fuel to
spurt out when removing the hoses.
c. Connect the pressure gauge "1" and adapter
"2" to the fuel hose (fuel tank to primary injec-
tor fuel rail).
a
b
a
d. Start the engine.
e. Measure the fuel pressure.
7-9
THROTTLE BODIES
Pressure gauge
90890-03153
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
1
2
Fuel pressure
250 kPa (2.5 kgf/cm
2
, 36.3 psi)