Ignition Timing
NOTE:
Engines are equipped with a receptacle for magnetic probe timing lights, located 10° ATDC. DO NOT
use this location for timing with a conventional light.
- Connect an adapter between No. 1 spark plug wire or use an inductive type pickup. DO NOT puncture wires. Connect timing light according to manufacturer's instructions.
- Check or adjust ignition timing with engine at normal operating temperature, distributor vacuum line disconnected and plugged. See Figure . The transmission should be in neutral.
- Once timing has been set, reconnect the vacuum line.
TIMING SPECIFICATIONS (Degrees BTDC @ RPM)
| Application | Man. Trans. | Auto. Trans |
|---|---|---|
| 7.4L | 4 @ 700 | 4 @ 700 |