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Intake Air System
Throttle Body
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Description
The throttle body is of the single barrel side-draft type.
T h e l o w e r p o r t i o n o f t h e t h r o t t l e v a l v e i s h e a t e d b y
engine coolant from the cylinder head. The idle adjusting
screw which increases/decreases
bypass air is located on
the top ot the thronle body.
IDLE ADJUSTING
SCREW
THROTTLE
STOP SCREW
(Non-adjustable)
FAST IDLE
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.o clearance.
THRoTTLE SToP scREw
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VALVE {A/T model onlv}
Inspection
1.
Start the engine. Hold the engine at 3,000 rpm with
n o l o a d { i n P a r k o r n e u t r a l ) u n t i l t h e r a d i a t o r f a n
c o m e s o n , t h e n l e t i t i d l e .
2 .
S t o p t h e e n g i n e , a n d c h e c k t h a t t h e t h r o t t l e c a b l e
operates smoothly without binding or sticking.
.
lf the throttle body pon is clogged, clean it with
carburetor cleaner.
.
lf there are any abnormalities in the above steps,
check for:
Excessive wear or play in the throttle valve shaft.
-
Sticky or binding throttle lever at full close posi-
t i o n .
-
Clearance between throttle stop screw and throt-
t l e l e v e r a t f u l l c l o s e p o s i t i o n .
81881, Bl8Cl engines:
There should be
no clearance.
818C5 engine:
THROTTLE LINK
There should be
throttle valve shaft or if the shaft is binding or sticking.
glL-
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Troubleshooting
