Ski-Doo Ski Doo MX Z 2005 [632/1429] Electric fuel pump pressure test

Ski-Doo Ski Doo MX Z 2005 [632/1429] Electric fuel pump pressure test
Section03FUELSYSTEM
Subsection 01 (FUEL TANK AND FUEL PUMPS)
ELECTRIC FUEL PUMP
PRESSURE TEST
Before proceeding to the pressure test, ensure
the battery is fully charged. Battery voltage must
be over 12 volts.
Release the fuel pressure in the system using
B.U.D.S. Refer to the Activation tab.
WARNING
The fuel hose may be under pressure. Cov-
er the fuel line connection with an absorbent
shop rag. Slowly disconnect the fuel hose
toreleasethepressure. Wipeoffanyfuel
spillage inside engine compartment.
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.
Ensure there is no leak from hoses and fittings.
Repair any leak.
Ensure there is enough gas in fuel tank.
Disconnect outlet hose from fuel pump.
Remove plastic clip (P/N 275 500 429) from male
fitting of pressure gauge (P/N 529 035 591).
Install the clip on male fitting of fuel rail inlet hose.
1
A32I0TA
TYPICAL
1. Clip installed on male fitting of fuel rail inlet hose
Install fuel pressure gauge (P/N 529 035 591) be-
tween disconnected hoses (in-line installation).
529 035 591
Remove tether cord cap. Depress START/RER
button and observe fuel pressure. Do not crank
engine. Repeat twice. Release pressure using
B.U.D.S. between tests so that the gauge is re-
set to zero (0).
FUEL PRESSURE
(when depressing start button)
400 kPa (58 PSI)
Crank or start engine and observe fuel pressure.
The fuel pressure should be the same as above.
If pressure is within limits, fuel pump and pressure
regulator are working adequately.
A rapid pressure drop indicates leakage either
from the fuel rail or from the fuel pump check
valve. Check fuel rail for leaks. If it 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 for leaks (see be-
low). If it is not leaking then replace fuel pump
module.
Release fuel pressure in the system using
B.U.D.S. Look in the Activation tab.
Remove pressure gauge and plastic clip from inlet
hose. Reinstall fuel hose.
WARNING
Wipe off any fuel spillage in the engine com-
partment. Fuel is flammable and explosive
under certain conditions. Always work in a
well ventilated area.
Reinstall removed parts.
110 mmr2005-123

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