Emission Control Systems

Ignition Timing:
With Vacuum Hoses Disconnected 4° BTDC
With Vacuum Hoses Connected:

Manual Transmission (at 800 +/- 50 rpm, in neutral)
49 State/High altitude 24° +/- 2° BTDC (red)
California 20° +/- 2° BTDC (red)

Automatic Transmission (at 730 +/- 50 rpm, in gear)
49 State/ High altitude 15° +/- 2° BTDC (red)
California 15° +/- 2° BTDC (red)