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FUEL SYSTEM
1 4 - 4 7
S E R V I C E P R O C E D U R E S
INDEX
Page
Air Switching, Canister Purge and EGR Diagnostic
Solenoid Service
55
Heated Oxygen Sensor ( 0
2
Sensor) Service . . . . . 55
Fuel Lines and Hoses
4 7
Page
Fuel System Pressure Release Procedure
. . . . . . 4 7
Single Board Engine Controller (SBEC) Service
. . 55
Throttle Body
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7
Throttle Body Components
48
FUEL LINES AND HOSES
W h e n servicing t h e fuel portion o f the system, i t
w i l l be necessary to preform the " F u e l System Pres-
sure Relief Procedure" t o bleed fuel pressure f r o m
t h e system before removing any clamps or hoses. Use
care w h e n r e m o v i n g fuel hoses to prevent damage t o
hose or hose nipple. D u r i n g assembly always use new
hose clamps o f the correct type. T i g h t e n hose clamps
to 1 N n n (10 i n . lbs.) torque. D o not u s e a v i a t i o n
s t y l e c l a m p s o n this s y s t e m o r h o s e d a m a g e m a y
r e s u l t .
FUEL SYSTEM PRESSURE RELEASE PROCEDURE
WARNING: T H E T B I FUEL SYSTEM IS UNDER A
CONSTANT PRESSURE OF APPROXIMATELY 100
KPA
(14.5 PSI). BEFORE SERVICING T H E FUEL
PUMP, FUEL
LINES,
FUEL
FILTER,
THROTTLE
BODY OR FUEL INJECTOR, THE FUEL SYSTEM
PRESSURE MUST B E RELEASED.
(1) Loosen fuel f i l l e r cap to release fuel t a n k pres-
sure.
(2) Disconnect injector w i r i n g harness f r o m engine
harness.
(3) Connect a j u m p e r w i r e t o g r o u n d t e r m i n a l
N u m b e r 1 o f the injector harness (Fig. 1) t o engine
ground.
(4) Connect a j u m p e r w i r e to the positive t e r m i n a l
N u m b e r 2 o f the injector harness (Fig. 1) and touch
the battery positive post for no longer t h a n 5 sec-
onds. This releases system pressure.
(5) Remove j u m p e r wires.
(6) Continue fuel system service.
TERMINAL #1
TERMINAL #2
8914-123
Fig. 11njector Harness Connectors
THROTTLE BODY
REMOVAL
(1) Remove a i r cleaner.
(2) Perform fuel system pressure release.
(3) Disconnect battery negative cable.
(4) Disconnect v a c u u m hoses and electrical connec-
tors.
(5) Remove t h r o t t l e cable. I f equipped,
remove
speed control and transmission k i c k down cables.
(6) Remove t h r o t t l e r e t u r n spring.
(7) Remove fuel i n t a k e and r e t u r n hoses (Fig. 2).
(8) Remove t h r o t t l e body m o u n t i n g screws and l i f t
t h r o t t l e body from vehicle. Remove t h r o t t l e body gas-
k e t f r o m i n t a k e manifold.
BOLTS (4)
THROTTLE BODY
ASSEMBLY
ISOLATOR
INTAKE
MANIFOLD
VIEW IN DIRECTION PWD
OF ARROW Y
CLAMI
FUEL SUPPLY
AND RETURN HOSE
ASSEMBLY
RR14G152
Fig. 2 Throttle Body Removal and Installation
INSTALLATION
(1) U s i n g a new gasket, i n s t a l l t h r o t t l e body and
t i g h t e n m o u n t i n g screws t o 20 N*m
(175 in-lbs)
torque.
(2) I n s t a l l fuel i n t a k e and r e t u r n hoses using new
o r i g i n a l equipment type clamps.
(3) I n s t a l l r e t u r n spring.
(4) I n s t a l l t h r o t t l e cable. I f equipped, i n s t a l l t r a n s -
mission kick-down and speed control cables.
(5) I n s t a l l w i r i n g connectors and v a c u u m hoses.
(6) I n s t a l l a i r cleaner.
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