Uel Tubes/Lines/Hoses And Clamps; Two-Tab Type Fitting - Jeep Wrangler 1997 Manual

14- 8 FUEL SYSTEM
SERVICE PROCEDURES (Continued)
(1) Disconnect negative battery cable at battery.
(2) Remove fuel tank filler tube cap to release fuel
tank pressure .
(3) Remove protective cap from pressure test port
on fuel rail .
WARNING : DO NOT ALLOW FUEL TO SPILL ONTO
THE ENGINE INTAKE OR EXHAUST MANIFOLDS .
PLACE SHOP TOWELS UNDER AND AROUND THE
PRESSURE PORT TO ABSORB FUEL WHEN THE
PRESSURE IS RELEASED FROM THE FUEL RAIL .
WARNING :
WEAR PROPER EYE PROTECTION
WHEN RELEASING FUEL SYSTEM PRESSURE.
(4) Obtain the fuel pressure gauge/hose assembly
from fuel pressure gauge tool set 5069. Remove
gauge from hose .
(5) Place one end of hose (gauge end) into an
approved gasoline container.
(6) Place a shop towel under test port .
(7) To release fuel pressure, screw other end of
hose onto fuel pressure test port .
(8) After fuel pressure has been released, remove
hose from test port .
(9) Install protective cap to fuel test port.
UEL TUBES/LINES/HOSES AND CLAMPS
Also refer to the section on Quick-Connect Fittings .
WARNING : THE FUEL SYSTEM IS UNDER A CON-
STANT PRESSURE (EVEN WITH THE ENGINE OFF) .
BEFORE SERVICING ANY FUEL SYSTEM HOSES,
FITTINGS OR LINES, THE FUEL SYSTEM PRES-
SURE MUST BE RELEASED . REFER TO THE FUEL
SYSTEM PRESSURE RELEASE PROCEDURE IN
THIS GROUP .
Inspect all hose connections such as clamps, cou-
plings and fittings to make sure they are secure and
leaks are not present . The component should be
replaced immediately if there is any evidence of deg-
radation that could result in failure .
Never attempt to repair a plastic fuel line/tube .
Replace as necessary.
Avoid contact of any fuel tubes/hoses with other
vehicle components that could cause abrasions or
scuffing. Be sure that the plastic fuel lines/tubes are
properly routed to prevent pinching and to avoid heat
sources .
The lines/tubes/hoses used on fuel injected vehicles
are of a special construction. This is due to the
higher fuel pressures and the possibility of contami-
nated fuel in this system . If it is necessary to replace
these lines/tubes/hoses, only those marked EFM/EFI
may be used .
TJ
When Used: The hose clamps used to secure rubber
hoses on fuel injected vehicles are of a special rolled
edge construction . This construction is used to pre-
vent the edge of the clamp from cutting into the
hose . Only these rolled edge type clamps may be
used in this system . All other types of clamps may
cut into the hoses and cause high-pressure fuel leaks .
When Used: Use new original equipment type hose
clamps . Tighten hose clamps to 1 N-m (15 in . lbs .)
torque .
QUICK-CONNECT FITTINGS
Also refer to the Fuel Tubes/Lines/Hoses and
Clamps section .
Two different types of quick-connect fittings are
used to attach various fuel system components .
These are : a two-tab type, or a plastic retainer ring
type using a latch clip .
TWO-TAB TYPE FITTING
This type of fitting is equipped with tabs located on
both sides of the fitting (Fig. 8) . These tabs are sup-
plied for disconnecting the quick-connect fitting from
component being serviced .
TAB(S)
FITTING
80a35405
Fig. 8 Typical Two-Tab Type Quick-Connect Fitting
CAUTION : The interior components (o-rings, spac-
ers) of this type of quick-connect fitting are not ser-
viced separately, but new plastic retainers are
available . Do not attempt to repair damaged fittings
or fuel lines/tubes . If repair is necessary, replace
the complete fuel tube assembly.
WARNING : THE FUEL SYSTEM IS UNDER A CON-
STANT PRESSURE (EVEN WITH THE ENGINE OFF) .
BEFORE SERVICING ANY FUEL SYSTEM HOSES,
FITTINGS OR LINES, THE FUEL SYSTEM PRES-
SURE MUST BE RELEASED . REFER TO THE FUEL
PRESSURE RELEASE
PROCEDURE IN THIS
GROUP .