GMC 1989 Light Duty Truck, Repair Manual, Page: 584 / 998

6C1-8 MODEL 1MEF CARBURETOR
4. Use c e n te r p u n c h (E) to b re a k p lu g a p a rt, to
unco ver id le m ix tu re n eedle.
5. Remove all loose pieces o f p lu g.
FUEL INLET NUT AND FILTER
• S u p p o rt c a rb u re to r to a void d a m a g in g e x te rn a l
co m p o n e n ts.
4—►
1 .
2
.
Remove or D isconnect
Fuel in le t n u t (210).
(Figure 12)
Fuel in le t f ilt e r (215), in le t n u t g aske t (212), and
f ilt e r sp ring (218).
• Discard g aske t.
L*
Inspect
• Cut f ilt e r o p e n . If c lo g g e d , check ta n k (s )
and fu e l line s fo r source o f m a te ria l.
IDLE STOP SOLENOID
Remove or D isconnect
4~*
(Figures 9,10)
• Idle stop s o le n o id (400), and id le sto p s o le n o id
sp rin g (401).
• Use 9 /16 " so cket o r hex w re n c h on end o f
o f s o le n o id body.
THROTTLE RETURN SPRING BRACKET
Remove o r D isconnect (Figures 9,1 0 )
Loosen b ra c k e t a tta c h in g screw (4 2 1 )(b o tto m ).
R em ove b ra c k e t a tta c h in g s c re w s (4 2 0 ) a n d
t h r o ttle re tu rn s p rin g a n c h o r b ra c k e t (415).
CHOKE COMPONENTS
Vacuum Break A ssem bly
Remove or D isconnect
V acuum b re a k hose (67).
(Figure 13)
A ir h o rn to f lo a t b o w l (vacuum b re a k a tta c h in g )
sc re w s (1 1 1 ) a n d b o w l s id e v a c u u m b r e a k
assem bly (65).
•
D is c o n n e c t v a c u u m b re a k f r o m v a c u u m
break lin k (69A).
• A l l o w c h o k e w ir e c o n n e c t o r b r a c k e t
assem bly (47A ) to h an g fre e ly .
Choke Housing
Remove or Disconnect
4 -¥
(Figure 14)
• Choke h ou sin g a tta c h in g screw s (36 , 37), and
ch oke hou sin g and b e a rin g a ssem bly (35).
• D isconnect choke h o u sin g fro m c h o k e lin k
(20A).
Fast Idle Cam and Link
Remove or Disconnect
4- +
(Figure 15)
• Fast id le cam a tta c h in g screw (12), cam (10) and
cam lin k (15).
• D isconnect fa st id le cam lin k fro m ch oke
s h a ft leve r (20).