Jeep Grand Cherokee WK. Manual — part 1257
6. Unplug connector from any fuel injector.
7. Attach one end of a jumper wire with alligator clips (18 gauge or smaller) to either injector terminal.
8. Connect other end of jumper wire to positive side of battery.
9. Connect one end of a second jumper wire to remaining injector terminal.
CAUTION: Powering an injector for more than a few seconds will permanently damage the injector.
10. Momentarily touch other end of jumper wire to negative terminal of battery for no more than a few seconds.
11. Place a rag or towel below fuel line quick-connect fitting at fuel rail.
12. Disconnect quick-connect fitting at fuel rail. Refer to Quick-Connect Fittings.
13. Return fuel pump relay to PDC.
14. One or more Diagnostic Trouble Codes (DTC’s) may have been stored in PCM memory due to fuel pump relay
removal. A diagnostic scan tool must be used to erase a DTC.
SPECIFICATIONS
FUEL SYSTEM PRESSURE
58 psi +/- 2 psi
TORQUE - FUEL SYSTEM
DESCRIPTION
N-m
Ft. Lbs.
In. Lbs.
Accelerator Pedal Bracket
Mounting
12
-
105
Accelerator Pedal Position
Sensor Mounting Nuts -
5.7L
3
-
30
Crankshaft Position
Sensor - 3.7L
28
21
-
Crankshaft Position
Sensor - 4.7L
28
21
-
Crankshaft Position
Sensor - 5.7L
12
-
105 (+/-20)
Camshaft Position Sensor
- 3.7L
12
-
106
Camshaft Position Sensor
- 4.7L
12
-
106
Camshaft Position Sensor
- 5.7L
12
9
105 (+/-) 20
Engine Coolant
Temperature Sensor - 3.7L
11
-
96
Engine Coolant
Temperature Sensor - 4.7L
11
-
96
Engine Coolant
Temperature Sensor - 5.7L
11
-
96
Fuel Filler Hose Clamp
3
-
30
Fuel Filler Housing-to-
Body Screws
2
-
17
Fuel Rail Mounting Bolts -
3.7L
11
-
100
14 - 2
FUEL DELIVERY
WK
DESCRIPTION
N-m
Ft. Lbs.
In. Lbs.
Fuel Rail Mounting Bolts -
4.7L
11
-
100
Fuel Rail Mounting Bolts -
5.7L
11
-
100
Fuel Tank Mounting Bolts
68
50
-
IAC Motor Mounting
Screws - 3.7L
7
-
60
IAC Motor Mounting
Screws - 4.7L
7
-
60
NVLD Pump Mounting
Bolt
8.5
-
75
Map Sensor Mounting
Screws - 3.7L
3
-
25
Map Sensor Mounting
Screws - 4.7L
3
-
25
PCM-to-Mounting Bracket
Mounting Screws
4
-
35
Power Steering Pressure
Switch - 3.7L
14-22
-
124-195
Power Steering Pressure
Switch - 4.7L
14-22
-
124-195
TPS Mounting Screws -
3.7L
7
-
60
TPS Mounting Screws -
4.7L
7
-
60
Throttle Body Mounting
Bolts - 3.7L
11
-
100
Throttle Body Mounting
Bolts - 4.7L
12
-
105
Throttle Body Mounting
Bolts - 5.7L
12
-
105
Oxygen Sensors
30
22
-
WK
FUEL DELIVERY
14 - 3
SPECIAL TOOLS
FUEL SYSTEM
LOCKRING REMOVER/INSTALLER #9340
TEST KIT, FUEL PRESSURE #5069
ADAPTERS, FUEL PRESSURE TEST - #6539
AND/OR #6631
O2S (OXYGEN SENSOR) REMOVER/INSTALLER -
#C-4907
14 - 4
FUEL DELIVERY
WK
SENSOR-FUEL LEVEL SENDING UNIT
DESCRIPTION
Refer to Fuel Pump Module for information.
REMOVAL
The fuel level sending unit (fuel level sensor) (3) and
float assembly (7) and (8) is located on the side of the
fuel pump module.
1. Remove fuel pump module from fuel tank. Refer to
Fuel Pump Module Removal/Installation.
2. Disconnect electrical connector from fuel pump
module. Record pin location first. Separate neces-
sary sending unit wiring from connector using ter-
minal pick / removal tool. Refer to Special Tools in
8W Wiring for tool part numbers.
3. To remove sending unit from pump module, use a
small pick (5) or screwdriver. Lift on plastic locking
tab (4) while sliding sending unit (3) down the
mounting tracks (6).
INSTALLATION
1. Noting the previously recorded pin positions, con-
nect necessary wiring into electrical connectors,
and into pump module.
2. Position sending unit (3) to pump module. Slide
unit on mounting tracks (6) and snap into place.
3. Install fuel pump module. Refer to Fuel Pump Mod-
ule Removal/Installation.
WK
FUEL DELIVERY
14 - 5
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