Ignition Timing
CAUTION:
Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tachometer to system. DO NOT allow tachometer terminal to become grounded or damage to ignitor and/or coil may exist.
- Ensure engine is at normal operating temperature. Connect timing light to engine. Connect tachometer to proper location. See Fig 1-5.
- Install jumper wire between proper terminals of engine check connector. See Fig 4-8. Ensure idle speed is within specification. See IDLE SPEED SPECIFICATIONS table in this article. Note that base timing is within specification. See IGNITION TIMING (Degrees BTDC @ RPM) table in this article. Adjust timing by turning distributor.
- On all models, remove jumper wire from engine check connector and check that advance timing is within specification. See IGNITION TIMING (Degrees BTDC @ RPM) table in this article.
IGNITION TIMING
| Application | Base Timing | Advance Timing | |
|---|---|---|---|
| Cressida | 10 @ 700 | 9-11 @ Idle | |
| Supra | |||
| Non-Turbo | 10 @ 700 | 9-10 @ Idle | |
| Turbo | 10 @ 650 | More than 12 @ Idle | |
| Land Cruiser | 7 @ 650 | 12 @ Idle | |