Pontiac TRANS AM 1977 Service Manual page 807

FUEL SYSTEM
6C-57
NOTE*: ANGLE GAUGE METHOD CAN ALSO BE USED
-
SEE PAGE 6C-39
NOTE: HOLD
7
GAUGE
/
VALVE AND INSIDE WALL
OF AIR HORN (SEE N0TE.I
VACUUM SOURCE
NOTE: PLUG PURGE
BLEED HOLE WITH
A PIECE O F MASKING
TAPE ON DELAY
FEATURE MODELS
USH INSIDE CHOKE COlL
\
LEVER C O U N T E R C L O C k
WISE UNTIL TANG ON VACUUM
BREAK LEVER CONTACTS TANG
ON VACUUM BREAK PLUNGER
FRONT VACUUM BREAK ADJUSTMENT
STEM
2 ROTATE COVER AND
O C O I L ASSEMBLY
UNTIL CHOKE VALVE
JUST CLOSES
FOLLOWER ON
HIGHEST STEP
OF CAM
AUTOMATIC CHOKE COlL ADJUSTMENT
IED
CARB. NO.
l7O5725O
253
255
256
258
262
263
266
274
502
504
550
653
582
584
CARB. NO.
17057250
253
255
256
258
262
263
266
274
502
504
550
553
582
584
CARB. NO.
17057250
253
255
256
258
262
263
266
274
502
504
550
553
582
584
LUG
AUGE
.125"
.125"
.125"
.125"
. I 2 5
. I 5 0
.166"
.l5O"
.150"
.166"
.165"
.126"
.125"
.166"
.165"
m
.l7O"
.1M"
.l7O"
.170"
.215"
.240"
.240"
.24OV'
.240"
--
--
.215"
.215"
--
--
INDE)
WARI(
2NR
2NR
2NR
2NR
2NR
1NR
1NR
1NR
1NR
2N L
2N L
2NR
2NR
2NL
2NL
-
NGLE
iAUGE
24'
24'
24'
24
'
24'
26'
28'
26'
26'
28.5'
28.5'
24'
24'
28.5
28.5'
-
rNGLE
IAUGE
30.5'
30.5'
30.5'
30.5'
36.5'
38'
38'
38'
3 8 '
--
--
36.5'
36.5'
--
--
-
-
-
3420
M4MC-CARBURETOR OVERHAUL ADJUSTMENTS
Fig. 6C-104 M4MC Adjustment Procedures