Pontiac tempest 1968 Service Manual page 336

E N G I N E F U E L
6B-29
WITH LOCK SCREW LOOSENED AND
WITH AIR VALVE CLOSED, TURN ADJUSTING
SCREW S P E C I F I E D NUMBER O F T U R N S AFTER
Fig. 6B-68 A i r V a l v e Spring Adjustment
venturi area. A l l screws must be tightened evenly
and securely,
3. Install idle vent actuating rod in pump lever
(Fig. 6B-66).
4. Connect pump rod in pump lever and retain
with spring clip.
5. Install secondary metering rods and hanger in
locating holes in air horn and replace screw. Check
for free operation of air valve and metering rods in
orifice plates.
6. Connect choke rod in lower choke lever and
retain in upper lever with spring clip.
7. Install vacuum break rod and clip.
PRIMARY THROTTLE ^ \ A F T E R SCREW MAKES
VALVE CLOSED >CONTACT ON L E V E R ,
TURN SCREW IN 3 TURNS
TO ADJUST.
Fig. 6B-70 Choke Rod Adjustment
PUMP ADJUSTMENT (Fig. 6B-65)
Disconnect link between primary and secondary
throttle levers so throttle valves are completely
closed. With pump rod in specified hole of pump
lever, measure from top of choke valve wall, next
to vent stack, to top of pump stem with adjustable
T-scale. Dimension should be 9/32".
Bend pump lever to adjust.
IDLE VENT ADJUSTMENT (Fig. 6B-66)
After pump rod adjustment has been made open
primary throttle to a point where, using an adjustable
T-scale, the distance from the top of the choke valve
Fig. 6B-69 Fast Idle Adjustment
Fig. 6B-71 Choke Coil Rod Adjustment