Section 07
ENGINE MANAGEMENT (4-TEC)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
SMR2002-078 _07_03A.FM
07-03-9
FUEL PUMP
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. Look in the
Activation
tab.
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.
Remove glove box to have access to fuel pump.
Refer to HULL/BODY section.
Remove air vent tube from front storage area.
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.
Install fuel pressure gauge (P/N 529 035 591) be-
tween disconnected hose (inline installation).
FUEL PRESSURE GAUGE (P/N 529 035 591)
1. Hose disconnected from fuel pump
2. In-line installation of fuel pressure gauge
Install safety lanyard and observe fuel pressure.
Do
not crank engine
. Repeat twice. Release pressure
using B.U.D.S. between tests so that the gauge is
“reset” to zero (0).
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 re-
place 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 below). 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 reinstall fuel hose.
Reinstall removed parts.
WARNING
The fuel hose may be under pressure. Cover
the fuel line connection with an absorbent
shop rag. Slowly disconnect the fuel hose to
release the pressure. Wipe off any fuel spill-
age inside bilge.
F02B0BA
FUEL PRESSURE
(when installing safety lanyard)
303 kPa (44 PSI)
WARNING
Wipe off any fuel spillage in the bilge. Fuel is
flammable and explosive under certain con-
ditions. Always work in a well ventilated area.
1
F18R08A
2
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Содержание GTX 4-TEC 5573 2002
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