Fuel Injector Rail/Fuel Damper-4.0L Engine - Jeep cherokee 2000 Service Manual

XJ
REMOVAL AND INSTALLATION (Continued)
(4) Remove air tube at top of throttle body. Note:
Some engine/vehicles may require removal of air
cleaner ducts at throttle body.
(5) Remove injector harness electrical connectors
at each injector. Each injector connector should have
a numerical tag attached identifying its correspond-
ing cylinder (Fig. 29). If not, identify each connector
before removal.
Fig. 29 Fuel Rail Mounting—2.5L Engine
1 – FUEL DAMPER
2 – FUEL INJECTOR
3 – NUMBERED TAG
4 – FUEL RAIL
5 – FUEL RAIL MOUNTING BOLTS/NUTS
6 – TEST PORT
7 – CABLE BRACKET
(6) Disconnect fuel supply line latch clip and fuel
line at fuel rail. Refer to Quick-Connect Fittings in
this group for procedures.
(7) Disconnect throttle cable at throttle body. Refer
to Throttle Cable Removal/Installation in this group
for procedures.
(8) Disconnect speed control cable at throttle body
(if equipped). Refer to Speed Control Cable in Group
8H, Speed Control System for procedures.
(9) Disconnect automatic transmission cable at
throttle body (if equipped).
(10) Remove cable routing bracket (Fig. 29) at
intake manifold.
(11) Remove nut securing crankshaft position sen-
sor pigtail harness to fuel rail mounting stud.
Remove clamp and harness from fuel rail mounting
stud.
(12) Clean dirt/debris from each fuel injector at
intake manifold.
(13) Remove fuel rail mounting nuts/bolts (Fig.
29).
(14) Remove fuel rail by gently rocking until all
the fuel injectors are out of intake manifold.
INSTALLATION
(1) Clean each injector bore at intake manifold.
(2) Apply a small amount of clean engine oil to
each injector o-ring. This will aid in installation.
(3) Position tips of all fuel injectors into the corre-
sponding injector bore in intake manifold. Seat injec-
tors into manifold.
(4) Install and tighten fuel rail mounting bolts to
11 3 N·m (100 25 in. lbs.) torque.
(5) Position crankshaft position sensor pigtail wire
harness clamp and wire harness to fuel rail mount-
ing stud. Install nut securing harness to fuel rail
mounting stud.
(6) Connect tagged injector harness connectors to
appropriate injector.
(7) Connect fuel line and fuel line latch clip to fuel
rail. Refer Quick-Connect Fittings in this group for
procedures.
(8) Install protective cap to pressure test port fit-
ting (if equipped).
(9) Install cable routing bracket to intake mani-
fold.
(10) Connect throttle cable at throttle body.
(11) Connect speed control cable at throttle body (if
equipped).
(12) Connect automatic transmission cable at
throttle body (if equipped).
(13) Install air tube (or duct) at top of throttle
body.
(14) Install fuel tank cap.
(15) Connect negative battery cable to battery.
(16) Start engine and check for fuel leaks.
FUEL INJECTOR RAIL/FUEL DAMPER—4.0L
ENGINE
REMOVAL
The fuel damper is not serviced separately.
WARNING: THE FUEL SYSTEM IS UNDER CON-
STANT FUEL PRESSURE EVEN WITH ENGINE OFF.
THIS PRESSURE MUST BE RELEASED BEFORE
SERVICING FUEL RAIL.
(1) Remove fuel tank filler tube cap.
(2) Perform Fuel System Pressure Release Proce-
dure.
(3) Disconnect negative battery cable from battery.
(4) Remove air tube at top of throttle body. Note:
Some engine/vehicles may require removal of air
cleaner ducts at throttle body.
FUEL SYSTEM 14 - 17