Ignition Timing
NOTE:
Procedures for timing adjustment are for engines equipped with HEI-EST distributors only. Other engines are equipped with C3I, DIS or IDI ignition system. Timing on these systems is not adjustable.
NOTE:
Some engines are equipped with a socket for a magnetic probe timing meter, located 9.5 degrees ATDC. DO NOT
use this location for setting timing using a conventional timing light.
- Place transmission in Park. Ensure engine is at normal operating temperature. Turn A/C and all accessories off. Ensure system is not in diagnostic mode.
- Jumper ALDL test terminals "A" and "B". Connect timing light to spark plug No. 1 wire. Check ignition timing, and adjust if necessary. See IGNITION TIMING SPECIFICATIONS below. Tighten distributor, and recheck timing. Remove jumper from ALDL test connector.
IGNITION TIMING SPECIFICATIONS
| Application | Degrees BTDC @ RPM |
|---|---|
| All Models | 6-10 @ Idle |