Ignition Timing
NOTE:
On vehicles equipped with automatic transmission, block the wheels and place selector lever in "D" position.
- Warm engine to normal operating temperature. Connect a tachometer, then connect timing light to leading (lower) spark plug of front rotor. Start engine and run at idle speed.
- Aim timing light at timing indicator pin on front cover and check ignition timing. Rotate distributor to correct timing, if necessary. Tighten distributor lock nut and recheck timing.
- Connect timing light to trailing (upper) plug of front rotor. Start engine and check timing. If not correct, loosen vacuum unit attaching screws. Move vacuum unit in or out to adjust trailing timing. Remove test equipment.
IGNITION TIMING (ATDC @ 800 RPM)
| Application | Timing | |
|---|---|---|
| Leading | ||
| Carbureted Models | 0° | |
| Fuel Injected Models | 5° | |
| Trailing | ||
| Carbureted Models | 20° | |
| Fuel Injected Models | 20° | |