Pontiac tempest 1968 Service Manual page 318

E N G I N E FUEL 6B-11
Fig. 6B-23 Choke Rod Adjustment
Fig. 6B-24 Unloader Adjustment
rod as shown to obtain sufficient clearance to allow
the insertion of an .080" gauge between lower edge of
choke valve and dividing wall of air horn.
Fig. 6B-25 Choke Coil Rod Adjustment
UNLOADER ADJUSTMENT (Fig. 6B-24)
Bend unloader tang on throttle lever as necessary
to allow insertion of a . 2 3 0 " ± . 0 3 0 " gauge between
the lower edge of choke valve and dividing wall of
air horn, with throttle valves held wide open.
CA UTION: Make sure unloader arm does not
interfere with fast idle cam screw after this
adjustment.
AUTOMATIC CHOKE ADJUSTMENT (Fig. 6B-25)
Disconnect upper end of choke thermostatic coil
rod from choke lever. Hold the choke valve com­
pletely closed and pull up on thermostatic coil rod
to the limit of its travel. The lower edge of rod
should be even with top edge of hole in choke shaft
lever for maximum rod length while the rod should
just line up with hole for minimum rod length.
To adjust, bend rod as shown.
ROCHESTER M V "MONOJET" CARBURETOR
Carburetor Model
Number Usage
*7028075 250 - M.T.
7028067 250 - M . T . - A / C
NOTE: Early production units use model number
7028065 which incorporates a different metering
rod setting as noted on page 6B-15.
All Rochester M.V. adjustments can be performed
on the car. With the exception of idle speed and
mixture adjustments, outlined in Section 6D., all
adjustments are included in the Overhaul and Ad­
justments procedure.
OVERHAUL AND ADJUSTMENTS
AIR HORN REMOVAL (Fig. 6B-26)
1. Remove upper choke lever retaining screw at
end of choke shaft. Then remove choke lever from
shaft.
2. Remove choke rod from slot in fast idle cam
by rotating rod. Remove upper lever from other
end of choke rod. Note position of rod in relation to
levers for ease in reassembly.