Fuel Pump Inspection; Fuel Discharge Amount Inspection - Suzuki VZ800 Service Manual

FUEL PUMP INSPECTION

Turn the ignition switch ON and check that the fuel pump operates for few seconds.
If the fuel pump motor does not make operating sound, inspect the fuel pump circuit connections or inspect
the fuel pump relay and tip-over sensor.
If the fuel pump relay, tip-over sensor and fuel pump circuit connections are OK, the fuel pump may be
faulty, replace the fuel pump with a new one.

FUEL DISCHARGE AMOUNT INSPECTION


Gasoline is highly flammable and explosive.
Keep heat, spark and flame away.
• Lift and support the fuel tank. (6-3)
• Disconnect the fuel feed hose 1 from the fuel delivery pipe.
• Disconnect the fuel pump lead wire coupler 2.
• Place the measuring cylinder and insert the fuel feed hose
end into the measuring cylinder.
• Connect a proper lead wire into the fuel pump lead wire cou-
pler (fuel pump side) and apply 12 volts to the fuel pump
(between Y/R wire and B/W wire) for 10 seconds and mea-
sure the amount of fuel discharged.
Battery + terminal
Battery - terminal
If the pump does not discharge the amount specified, it means
that the fuel pump is defective or that the fuel filter is clogged.
 Fuel discharge amount: 168 ml and more/10 sec.
NOTE:
The battery must be in fully charged condition.
(Yellow with red tracer)
(Black with white tracer)
(5.7/5.9 US/Imp oz)/10 sec.
FUEL SYSTEM AND THROTTLE BODY 6-5