TOHATSU BFT75A - Fuel Pump (Low Pressure Side); Inspection; Fuel Pump (High Pressure Side)

5-99
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FUEL SYSTEM
FUEL PUMP (LOW PRESSURE SIDE)
INSPECTION
Remove the fuel pump (low pressure side) (page 5-67).
Push the fuel pump plunger [1] and make sure the
plunger moves smoothly.
If the plunger is stiff, replace the fuel pump (low
pressure side).
FUEL PUMP (HIGH PRESSURE SIDE)
INSPECTION
DISCHARGE VOLUME INSPECTION
• Use a known-good battery for the inspection.
Disconnect the pressure regulator return hose [1].
Place a measuring cylinder [2] under the hose.
Turn the combination switch ON.
Operate the fuel pump for approximately 2 seconds and
measure the fuel discharge volume of gasoline using a
measuring cylinder.
If the discharge volume is less than the specified value,
or no fuel is discharged, check the following.
– Fuel pump (high pressure side) circuit (page 5-100)
– Clogged fuel filter (high pressure side), and fuel
hose/line.
– Pressure regulator operation (page 5-98)
If no abnormality is detected, replace the fuel pump
(high pressure side) (page 5-76).
[1]
Gasoline is highly flammable and explosive.
You can be burned or seriously injured when
handling fuel.
• Keep heat, sparks, and flame away.
• Wipe up spills immediately.
• Handle fuel only outdoors.
Discharge volume
20 cm
3
(0.7 US oz, 0.7 Imp oz) or more
[1]
[2]