Venturi Cluster Passage Identification; Flange - Bowl Passage Identification; Body To Bowl Cover Passage Identification; Throttle Flange Passage Identification - Pontiac Grand Prix Service Manual

6B-16 1%9 PONTIAC SERVICE MANUAL
MAIN WELL
AIR
BLEEDS
Fig.
66-33
Venturi Cluster Passage ldentification
b. Check float lip for wear and float for damage.
c. Check throttle and choke shaft bores in throttle body
and cover castings for wear or out of round.
Fig. 66-35
Flange - Bowl Passage ldentification
"
e. Inspect fast idle cam. If wear is noted on steps of
d. Inspect idle adjusting needle for burrs or ridges.
cam, it should be replaced as it may upset engine idle
Such a condition requires replacement.
speed during the warm-up period.
f. Inspect pump plunger cup. Replace plunger if cup is
damaged.
g. Inspect power piston and spring for burrs or
distortion. Replace if necessary.
4. Check all filter screens for dirt or lint. Clean and, if
they are distorted or plugged, replace with new parts.
IDLE NEEDLE HOLES
\ - -
1 '
CHOKE VACUUM
I D L E DISCHARGE
SLOTS
Fig. 68-34 Body
to Bowl Cover Passage Identification
Fig.
68-36
Throttle Flange Passage Identification