IEC 3640, Быстрый старт

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2
2-5 Fuel
WARNING: Systems without test ports require that fuel lines be
removed or disconnected. Please be aware that these lines
may be UNDER PRESSURE, and when removed could cause
fuel spray and/or leakage onto hot engine parts.
a. Relieve fuel system pressure BEFORE connecting tester (refer to your
vehicle's service manual for procedures).
b. Loosen the fuel tank cap to release any pressure from the fuel tank.
c.
Verify the ignition is off. Locate the fuel system’s inlet line (or hose) leading
to the fuel rail or throttle body. (Refer to your vehicle’s service manual for
locations.)
d. CAREFULLY disconnect inlet fuel line (supply line) from system
connection point. INLET MAY BE UNDER PRESSURE. Try to keep
hoses in an upright position to avoid excess fuel leakage. BE SURE TO
CLEAN UP FUEL SPILLS IMMEDIATELY.
NOTE:
On Throttle Body Injection (TBI) systems, the supply line connection is
typically located at the throttle body. On Multiport Fuel Injection
(MFI) systems, the supply line connection is typically located at the fuel
rail.
e. Connect the inlet fuel line (supply line) from the vehicle (the one removed
in step d) to one end of the tee fitting. Push the hose on to the fitting as far
as it will go and secure using a hose clamp. Tighten the hose clamp
securely.
f. Locate the two hose pieces included with the tester (there are two different
size hose pieces). Select the hose piece which fits best on the open end of the
tee fitting and on the injection system’s inlet fitting. Attach one end of the
hose piece to the tee fitting. Push the hose on to the fitting as far as it will
go and secure using a hose clamp. Tighten the hose clamp securely. Attach
the other end of the hose piece to the injection system’s inlet fitting. Push
the hose on to the fitting as far as it will go and secure using a hose clamp.
Tighten the hose clamp securely (see Figure 6).
g. Connect the gauge hose to the open fitting on top of the tee, FINGER
TIGHT ONLY.
h.
Place the bleed-off hose into an approved drain container. MAKE SURE
the hose remains in the container until testing is complete.
i. MAKE SURE all of the vehicle’s accessories (air conditioner, fan, radio,
defroster, lights, etc.) are turned off.
j. Turn ignition on and listen for fuel pump activation (most systems will
activate the fuel pump circuit for approximately two seconds when the
ignition is initially turned on to prime the fuel system). Check the test
setup and
MAKE SURE no fuel leaks are present.
■
If fuel leaks ARE present, turn off ignition IMMEDIATELY and
repair any leaks. BE SURE TO CLEAN UP FUEL SPILLS
IMMEDIATELY.
NOTE: If your fuel system does not operate as described in step j, or if fuel
system is not operating properly, refer to the manufacturer’s service
manual for repair procedures or activation instructions.
k. When the fuel pump has been activated in step j, the fuel system is
pressurized. Verify the tester gauge indicates a system pressure which
corresponds with the specifications provided in your vehicle’s service
manual. If the fuel pressure is within vehicle manufacturer's specifications,
proceed to step m. If pressure is not within manufacturer's specifications,
proceed to step l.