Choke Unloader Adjustment (2100-2 Venturi); Automatic Choke Adjustment (2100-2 Venturi); Accelerating Pump Stroke Adjustment (2100-2 Venturi) - Jeep 1979 CJ-5 Technical & Service Manual

FUEL SYSTEMS 1J-31
(2) Measure clearance between lower edge of choke
valve and air horn wall. Refer to Specifications for cor-
rect setting.
(3) Adjust by turning fast idle cam lever screw.
(4) Loosen choke cover retaining screws and adjust
choke as outlined under Automatic Choke Adjustment.
(5) Install choke shield clamp and retaining screws.
Fig. 1J-58 Fast Idle Cam Linkage Adjustment
Choke Unloader Adjustment
(1) Hold throttle fully open and apply pressure on
choke valve toward closed position.
(2) Measure clearance between lower edge of choke
valve and air horn wall. Refer to Specifications for cor-
rect setting.
CAUTION: Do not bend the unloader tang downward
from a horizontal plane.
(3) Adjust by bending unloader tang which contacts
fast idle cam (fig. 1J-59). Bend toward cam to increase
clearance and away from cam to decrease clearance.
(4) After making adjustment, open throttle until
unloader tang is directly below fast idle cam pivot.
There must be exactly 0.070-inch (1.8 mm) clearance
between unloader tang and edge of fast idle cam (fig. 1J-
60).
(5) Operate throttle and check unloader tang to
make sure it does not bind, contact or stick on any part
of carburetor casting or linkage. After carburetor instal-
lation, check for full throttle opening when throttle is
operated from inside vehicle. If full throttle opening is
not obtainable, it may be necessary to remove excess
padding under floormat or reposition throttle cable
bracket located on engine.
Automatic Choke Adjustment
Loosen choke cover retaining screws and rotate cover
in the desired direction as indicated by the arrow on the
face of the cover. Refer to Specifications for the correct
FAST I D L E
Fig. 1J-59 Unloader Adjustment
Fig. 1J-6C Moader to Fast Idle Cam ClesraRse
setting. The specified setting will be satisfactory for
most driving conditions.
N O T E : The automatic choke acts like a timer. The
richer the setting the longer the spring tension acts
against the linkage and holds the choke in a closed
position. Warmed incoming air warms the spring.
Spring tension is reduced and fast idle cam weight
moves the choke linkage against spring tension.
Accelerating
P i m p Strike
Adjustment
The specified accelerator pump stroke has been se-
lected to help keep the exhaust emission level of the
engine within Federal limits. The unused adjustment
holes permit adjusting the stroke for specific engine and
climate applications. The primary throttle shaft lever
(overtravel lever) has four holes and the accelerator
pump link has two holes (fig. 1J-61).