Jeep Wrangler TJ. Manual — part 465
The o-rings and spacer will remain in quick-con-
nect fitting connector body.
(9) Plastic Retainer Ring Type Fitting: This
type of fitting can be identified by the use of a full-
round plastic retainer ring (Fig. 33) usually black in
color.
(a) To release fuel system component from quick-
connect fitting, firmly push fitting towards compo-
nent being serviced while firmly pushing plastic
retainer ring into fitting (Fig. 33). With plastic ring
depressed, pull fitting from component. The plas-
tic retainer ring must be pressed squarely
into fitting body. If this retainer is cocked
during removal, it may be difficult to discon-
nect fitting. Use an open-end wrench on
shoulder of plastic retainer ring to aid in dis-
connection.
(b) After disconnection, plastic retainer ring will
remain with quick-connect fitting connector body.
(c) Inspect fitting connector body, plastic retainer
ring and fuel system component for damage.
Replace as necessary.
(10) Latch Clips: Depending on vehicle model and
engine, 2 different types of safety latch clips are used
(Fig. 34) or (Fig. 35). Type-1 is tethered to fuel line
and type-2 is not. A special tool will be necessary to
disconnect fuel line after latch clip is removed. The
latch clip may be used on certain fuel line/fuel rail
connection, or to join fuel lines together.
(a) Type 1: Pry up on latch clip with a screw-
driver (Fig. 34).
(b) Type 2: Separate and unlatch 2 small arms
on end of clip (Fig. 35) and swing away from fuel
line.
(c) Slide latch clip toward fuel rail while lifting
with screwdriver.
(d) Insert special fuel line removal tool (Snap-On
number FIH 9055-1 or equivalent) into fuel line
(Fig. 36). Use tool to release locking fingers in end
of line.
(e) With special tool still inserted, pull fuel line
from fuel rail.
(f) After
disconnection,
locking
fingers
will
remain within quick-connect fitting at end of fuel
line.
Fig. 34 LATCH CLIP-TYPE 1
1 - TETHER STRAP
2 - FUEL LINE
3 - SCREWDRIVER
4 - LATCH CLIP
5 - FUEL RAIL
Fig. 35 LATCH CLIP-TYPE 2
1 - LATCH CLIP
Fig. 36 FUEL LINE DISCONNECTION USING
SPECIAL TOOL
1 - SPECIAL FUEL LINE TOOL
2 - FUEL LINE
3 - FUEL RAIL
TJ
FUEL DELIVERY
14 - 19
QUICK CONNECT FITTING (Continued)
(11) Disconnect quick-connect fitting from fuel sys-
tem component being serviced.
CONNECTING
(1) Inspect quick-connect fitting body and fuel sys-
tem component for damage. Replace as necessary.
(2) Prior to connecting quick-connect fitting to
component being serviced, check condition of fitting
and component. Clean parts with a lint-free cloth.
Lubricate with clean engine oil.
(3) Insert quick-connect fitting into fuel tube or
fuel system component until built-on stop on fuel
tube or component rests against back of fitting.
(4) Continue pushing until a click is felt.
(5) Single-tab type fitting: Push new tab down
until it locks into place in quick-connect fitting.
(6) Verify a locked condition by firmly pulling on
fuel tube and fitting (15-30 lbs.).
(7) Latch Clip Equipped: Install latch clip (snaps
into position). If safety latch clip will not fit, this
indicates fuel line is not properly installed to
fuel rail (or other fuel line). Recheck fuel line
connection.
(8) Connect negative cable to battery.
(9) Start engine and check for leaks.
14 - 20
FUEL DELIVERY
TJ
QUICK CONNECT FITTING (Continued)
FUEL INJECTION
TABLE OF CONTENTS
page
page
FUEL INJECTION
. . . . . . . . . . . . . . . . . . . . . . . . . 22
ACCELERATOR PEDAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . 23
CRANKSHAFT POSITION SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . 23
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
. . . . . . . . . . . . . . . . . . . . . . . . . 25
FUEL INJECTOR
. . . . . . . . . . . . . . . . . . . . . . . . . 27
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
. . . . . . . . . . . . . . . . . . . . . . . . . 28
FUEL PUMP RELAY
. . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . 28
IDLE AIR CONTROL MOTOR
. . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
. . . . . . . . . . . . . . . . . . . . . . . . . 30
INTAKE AIR TEMPERATURE SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . 31
MAP SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 31
. . . . . . . . . . . . . . . . . . . . . . . . . . . 31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
. . . . . . . . . . . . . . . . . . . . . . . . . 33
O2 HEATER RELAY
. . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . 34
O2 SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . 34
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . . . . . . . . . . 36
THROTTLE BODY
. . . . . . . . . . . . . . . . . . . . . . . . . 36
. . . . . . . . . . . . . . . . . . . . . . . . . . . 36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
. . . . . . . . . . . . . . . . . . . . . . . . . 37
THROTTLE CONTROL CABLE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
. . . . . . . . . . . . . . . . . . . . . . . . . 40
THROTTLE POSITION SENSOR
. . . . . . . . . . . . . . . . . . . . . . . . . 40
. . . . . . . . . . . . . . . . . . . . . . . . . . . 40
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
. . . . . . . . . . . . . . . . . . . . . . . . . 41
TJ
FUEL INJECTION
14 - 21
FUEL INJECTION
DESCRIPTION
The Powertrain Control Module (PCM) operates the
fuel injection system. Refer to Powertrain Control Mod-
ule in Electronic Control Modules for information.
SPECIFICATIONS
TORQUE - FUEL INJECTION
DESCRIPTION
N-m
Ft. Lbs.
In. Lbs.
Accelerator Pedal Bracket
Mounting Nuts
8.5
-
75
Engine Coolant
Temperature Sensor -
2.4L/4.0L
11
-
96
IAC Motor-To-Throttle
Body Bolts - 2.4L/4.0L
7
-
60
Intake Manifold Air Temp.
Sensor - 4.0L
28
20
-
MAP Sensor Mounting
Screws - 2.4L/4.0L
3
-
25
Oxygen Sensor -
2.4L/4.0L
30
22
-
PCM Mounting Screws
4
-
35
Throttle Body Mounting
Bolts - 2.4L/4.0L
11
-
100
Throttle Position Sensor
Mounting Screws -
2.4L/4.0L
7
-
60
Vehicle Speed Sensor
Mounting Bolt
2.2
-
20
14 - 22
FUEL INJECTION
TJ
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