5.FUEL SYSTEM
5-
FUEL PRESSURE TEST
The pressure test will show the available pressure at the fuel pump outlet. It validates the
pressure regulator, the fuel pump and leaks in the system.
Before proceeding to the pressure test ensure the battery is fully charged. Battery voltage must
be over 12 volts.
Ensure there is enough gas in fuel tank.
Remove left seat.
Disconnect outlet hose.
Install fuel pressure gauge and T-fitting
between disconnected hoses.
Turn ignition key ON and set engine stop switch
to RUN and observe fuel pressure. Turn
ignition key off then back on. Repeat the test.
Standard fuel pressure: 350kpa.
A rapid pressure drop indicates leakage is from the fuel rail, If there is not leaking then replace
fuel pump.
A slow pressure drop indicates leakage either from the fuel injector or from the fuel pressure
regulator. Check fuel injector and the fuel pressure regulator for leaks. If it is not leaking then
replace fuel pump module.
If no leakage, start engine and observe fuel pressure. The fuel pressure should be the same as
above.
If pressure is within limits, fuel pump and the fuel pressure regulator are working adequately.
Remove pressure gauge from inlet hose. Reconnect inlet hose.
FUEL FILTER
Replace fuel filter as per maintenance schedule.
Filter Removal
Remove clamps and pull hoses off.
Detach filter from body.
Filter inspection
If fuel filter is suspected to be clogged, it may be checked as follows:
Using low compressed air, check if fuel filter is clogged. Air should flow easily through filter. In
doubt, install a new filter.
Filter installation
Use arrow on filter to position it according to fuel flow.
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