Pontiac FIREBIRD 1972 Service Manual page 732

68-78
1972 PONTIAC SERVICE MANUAL
CLEANING AND INSPECTION
NOTE: The carburetor should be cleaned in a
cold immersion type cleaner.
1. Thoroughly clean carburetor castings and
metal parts in an approved carburetor cleaner
such as Carbon-X
(X-55)
o r its equivalent.
CAUTION: Any rubber parts, plastic parts,
diaphragms, pump plungers, should not be im-
mersed in carburetor cleaner. However, the
delrin cam on the air valve shaft will with-
stand normal cleaning in carburetor cleaner.
2. Blow out all passages in castings with com-
pressed air. Do not pass drills through jets or
passages.
3. Inspect idle mixture needles for damage.
4. Examine float needle and seat for wear.
Replace if necessary with new float needle
assembly.
5.
Inspect upper and lower surfaces of car-
buretor castings for damage.
6. Inspect holes in levers for excessive wear
or out-of-round conditions. If worn, levers
should be replaced.
7. Examine fast idle cam for wear or damage.
8. Check air valve for binding conditions. If
air valve is damaged, air horn assembly must be
replaced.
9. Check all throttle levers and valves for
binds or other damage.
Fig.
68-92
Cleaning
81
Inspection Procedure