Jeep 1987 Wrangler Workshop Manual page 1586

JivG
THROTTLE BODY FUEL INJECTION SYSTEM
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JivG
1.4L 1986-1987/1.7L/2.46L
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S E E
I.S.
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T
E
S
IDLE SPEED ACTUATOR (ISA)
MOTOR ADJUSTMENT
A d j u s t m e n t of t h e I S A motor p l u n g e r i s
n e c e s s a r y only to establish the initial position of
the plunger after the motor h a s been replaced.
W A R N I N G : U s e extreme caution w h e n the
engine is operating. Do not stand in a direct line
with the fan. Do not put your h a n d s near the
pulleys, belts or fan. Do not wear loose clothing.
R e m o v e the air filter (Renault), or bonnet (Jeep),
and start the engine.
A l l o w e n g i n e to a t t a i n n o r m a l o p e r a t i n g
temperature (upper radiator hose hot).
Turn the A / C (if equipped) to the O F F position.
Connect a tachometer to diagnostic terminals
D1-1 and D1-3.
CONNECTOR 0 2 CONNECTOR 01
FRONT O F V E H I C L E
83051
Turn the ignition off. T h e I S A motor plunger
should move to the fully extended position.
With the I S A motor plunger fully extended,
d i s c o n n e c t t h e I S A m o t o r w i r e h a r n e s s
connector and start the engine.
With this condition, the engine idle s p e e d should
be 3 5 0 0 R P M ( ± 2 0 0 ) . If the s p e e d is not
correct, turn the hex head screw (A) on the end
of the plunger to provide an engine s p e e d of
3500 R P M .
A -Hex-head adjustment screw (also part of the
closed throttle switch plunger).
B - Idle speed control (ISC) motor
C-Throttle lever
83052
Fully retract the ISA motor by holding the closed
throttle switch plunger in while the throttle is
o p e n e d . T h e c l o s e d throttle switch plunger
should not be touching the throttle lever when
the throttle is returned to the closed position. If
contact is noted, check the throttle linkage a n d /
or c a b l e for binding or d a m a g e . C o r r e c t if
n e c e s s a r y .
Connect the ISA wire h a r n e s s connector.
Turn the ignition off for 10 s e c o n d s . T h e I S A
motor s h o u l d m o v e to the fully e x t e n d e d
position.
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