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FUEL SYSTEM
14-51
FUEL
FITTINGS
Removal
(1) Remove a i r cleaner assembly.
(2) Perform Fuel System Pressure Release.
(3) Disconnect b a t t e r y negative cable.
(4) Loosen fuel i n t a k e and r e t u r n hose clamps.
W r a p a shop towel around each hose, t w i s t a n d p u l l
o f each hose.
(5) Remove each
fitting
and note i n l e t diameter
(Fig. 5). Remove copper washers.
FUEL PRESSURE
REGULATOR
THROTTLE POSITION SENSOR
(TPS)
FUEL INLET
FITTING
RR14G153
Fig. 5 Servicing Fuel Fitting
Installation
(1) Replace copper washers w i t h new washers.
(2) I n s t a l l fuel f i t t i n g s i n proper ports and t i g h t e n
to 20 N n n (175 i n . lbs.) torque.
(3)
U s i n g
new
o r i g i n a l equipment
type
hose
clamps, i n s t a l l fuel r e t u r n and supply hoses. T i g h t e n
hose clamps to 1 N n n (10 i n . lbs.) torque.
(4) Reconnect battery negative cable.
(5) U s i n g D R B I I diagnostic tester, w i t h the key i n
t h e " R u n " position, use Special Functions " A S D F u e l
System Test", to activate the fuel pump and pressur-
ize the system. Check for leaks.
(6) R e i n s t a l l a i r cleaner assembly.
THROTTLE
BODY TEMPERATURE
SENSOR
Removal
(1) Remove a i r cleaner from engine.
(2) Disconnect t h r o t t l e body temperature sensor
electrical connector.
(3) Remove sensor (Fig. 6).
Installation
(1) A p p l y heat transfer compound (provided w i t h
new sensor) to t i p of new sensor.
(2) I n s t a l l sensor and t i g h t e n to 12 N n n (110 i n .
lbs.) torque.
(3) Connect electrical connector to sensor.
(4) I n s t a l l a i r cleaner.
THROTTLE BODY TEMPERATUR!
SENSOR
RR14G154
Fig. 6 Throttle Body Temperature Sensor—5.2L
and
5.9L
Engines
FUEL PRESSURE
REGULATOR
Removal
(1) Remove a i r cleaner assembly.
(2) Perform fuel system pressure release.
(3) Disconnect battery negative cable.
(4) Remove vacuum hose from t h r o t t l e body.
(5) Remove screws a t t a c h i n g pressure regulator to
t h r o t t l e body.
WARNING: PLACE A SHOP TOWEL AROUND FUEL
INLET OF
THE
PRESSURE REGULATOR TO
AB-
SORB ANY
RESIDUAL FUEL REMAINING IN
THE
SYSTEM.
(6) Remove pressure regulator f r o m t h r o t t l e body
(Fig. 7).
(7) Carefully remove O-ring f r o m pressure regula-
t o r (Fig. 7). Remove gasket.
- L i
»
— J M I
rcZ?FUEL PRESSURE REGULATOR
FUEL INJECTORS
FUEL PRESSURE REGULATOR
WIRING CONNECTOR
VACUUM NIPPLE
8914-129
Fig. 7 Servicing Fuel Pressure Regulator
Installation
(1) Place new gasket on pressure regulator and
carefully i n s t a l l new O-ring.
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