Pontiac FIREBIRD 1972 Service Manual page 677

ENGINE FUEL 6B-23
METERING ROD ADJUSTMENT (Fig. 6B-24)
METERING ROD MUST BE REMOVED FOR ADJUSTMENT;
(HOLD THROTTLE VALVE WIDE OPEN, PUSH DOWN ON
METERING ROD AGAINST SPRING TENSION AND SLIDE ROD
OUT OF SLOT IN HOLDER)
\
BENDING
I W W L
HOLD POJYER
PISTON DOWN PLUG GAUGE
FLOAT BOJVL
SURFACE
(GASKET REMOVED)
@
BACK OUT IDLE SPEED SCREW
HOLD THROTTLE VALVE
COMPLETELY CLOSED
Fig. 6B-24 Metering Rod Adjustment
nect the choke vacuum break diaphragm link to
the thermostatic coil lever and install lever to
the end of the choke shaft, using retaining
screw. Tighten all screws securely.
3. Install the choke vacuum break diaphragm hose to
the diaphragm on air horn and tube on air horn.
4. Assemble choke rod into the slot in the upper choke
lever. End of rod points away from air horn casting
when installed properly.
5. Install lower end of choke rod into fast idle cam.
Steps on fast idle cam should face fast idle tang on
throttle lever. Install fast idle cam to boss on float
bowl with attaching screw. Tighten securely.
6. Install C.E.C. valve into bracket on float bowl. Install
large retaining nut and tighten securely. Then, bend
lock retaining ears over on flats of nut so that nut is
locked securely in place.
7. Install vacuum hose to the upper tube on float bowl
I
and to outer tube on the C.E.C. valve.
Fig. 68-25 Air Horn Tightening Sequence