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1
- BTDC - Before top dead center
2
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D- Drive N- neutral
3 - Manual trans.- 8° BTDC
Auto trans.- 6° BTDC
4 - A/C turned to full on position
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5 - Turn adjusting screw in
Clockwise until engine misfires,
then turn screw out 1/2 turn
6 - 12° BTDC for V8-425 with two
carbs and auto trans.
7- Air Injector reactor (A.I.R)
8- SEE Chevrolet for service
procedure
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9- 5° BTDC for Lesabre
10- 2 Barrel 45S, 4 Barrel 44S
11- 4 barrel carbs and all
Lesabres 4°, all other 10°
12- Std.tran TDC Auto tran 4°
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13- Manual tran 8°, auto 10°
14-Exc. Intermediate model Stage
I eng 4° BTDC, intermediate
model Stage I 10°
15-SEE Oldsmobile for service
procedure
16- SEE Pontiac for service
procedure
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