Honda CBF190WH 2016 Shop Manual page 28

FUEL SUPPLY TEST
FUEL PRESSURE TEST
to INJECTOR
(fuel feed hose)
from FUEL PUMP
FUEL FLOW INSPECTION
[A]
[B]
from FUEL PUMP
[A]
• If the fuel in tank is sufficient but such symptom as poor en-
gine performance, lack of fuel, or engine start failure exist,
perform the following.
• Perform the fuel pressure test. 2-3
• If the fuel pressure is within specification, perform the fuel
flow inspection. 2-3
• Perform the fuel flow inspection in the specified fuel quan-
tity. 2-3
• Quick connect fitting (fuel pump side)
• Attach the fuel pressure gauge and attachment.
[A] Fuel pressure gauge: 07406-0040004
[B] Fuel pressure gauge attachment: 070MJ-K260100
• Temporarily connect the negative cable to the battery and
fuel pump 5P connector.
Start the engine and let it idle, and read the fuel pressure.
Standard: 263 – 316 kPa
• If the fuel pressure is higher than specified, replace the fuel
pump assembly. 2-4
• If the fuel pressure is lower than specified, inspect the
following.
– Fuel line leaking
– Any erratic swing or vibration of the gauge needle in the
pressure gauge reading.
• If the needle is swing or vibration, replace the fuel fil-
ter. 2-5
• If the needle is stable, replace the fuel pump unit. 2-
4
• Quick connect fitting (injector side) 2-2
• Place the end of the hose into an approved gasoline con-
tainer. Wipe off spilled out gasoline.
• The fuel pump operates for 2 seconds. Repeat 5 times to
meet the total measuring time.
Standard: 36 cm3 minimum/10 seconds
• If fuel flow is less than specified, inspect the following:
– Clogged fuel hose
– Fuel pump unit
• Place the vehicle on the level ground with its center-
stand. Adjust the fuel in the tank so that the fuel gauge
segment is positioned the specified range [A], and inspect
the fuel flow.
– If the fuel flow is above specification, check for other mal-
functioning parts.
– If the fuel flow is under specification, replace the fuel fil-
ter. 2-5
FUEL & ENGINE
2-3