Installation - Fuel Pressure Solenoid; Boost Pressure Sensor Description - Jeep 2002 WJ Service Manual

14a - 10 FUEL INJECTION
FUEL PRESSURE SOLENOID (Continued)
Fig. 11 FUEL PRESSURE SOLENOID OPERATION
1 - BALL SEAT
2 - SPRING FORCE
3 - MAGNETIC FORCE
4 - COIL
5 - FUEL PRESSURE SOLENOID
6 - HIGH PRESSURE FEED
(3) Remove fuel rail (Refer to 14 - FUEL SYSTEM/
FUEL INJECTION/FUEL INJECTOR - REMOVAL).
(4) Clamp fuel rail securely in vise with protective
jaws.
NOTE: Once removed, the pressure solenoid must
always be replaced.
(5) Remove fuel pressure solenoid retaining screws
and remove solenoid (Fig. 12).

INSTALLATION - FUEL PRESSURE SOLENOID

WARNING: NO SPARKS, OPEN FLAMES OR SMOK-
ING. RISK OF POISONING FROM INHALING AND
SWALLOWING FUEL. RISK OF INJURY TO EYES
AND SKIN FROM CONTACT WITH FUEL. POUR
FUELS ONLY INTO SUITABLE AND APPROPRI-
ATELY MARKED CONTAINERS. WEAR PROTECTIVE
CLOTHING.
NOTE: Apply a thin film of special grease to the
seals before installing. If the seals are damaged
when being installed, an internal leak may occur
which can not be recognized externally.
(1) Position fuel pressure solenoid to fuel rail and
retain with screws. Tighten in two stages 3N·m (26
lbs. in.), then 5N·m (44 lbs. ft.).
Fig. 12 FUEL PRESSURE SOLENOID ASSEMBLY
1 - RETAINING BOLT
2 - FUEL PRESSURE SOLENOID
3 - RETAINING BOLT
4 - O-RING LOCATION
5 - FUEL RAIL
6 - VISE
(2) Install fuel rail (Refer to 14 - FUEL SYSTEM/
FUEL INJECTION/FUEL INJECTOR - INSTALLA-
TION).
(3) Install engine cover (Refer to 9 - ENGINE -
INSTALLATION).
(4) Connect negative battery cable.
WARNING: USE EXTREME CAUTION WHEN ENGINE
IS OPERATING. DO NOT STAND IN A DIRECT LINE
WITH THE FAN. DO NOT PUT YOUR HANDS NEAR
PULLEYS, BELTS, OR FAN. DO NOT WEAR LOOSE
CLOTHES.
(5) Start engine and inspect for leaks.
BOOST PRESSURE SENSOR
DESCRIPTION
The boost pressure sensor is mounted to the top of
the intake manifold just above the intake air inlet
(Fig. 13). The sensor allows the ECM to monitor air
pressure within the intake manifold.
WG