Ignition Timing

CAUTION: Some tachometers may not be compatible with ignition system. Consult tachometer manufacturer before connecting tachometer to ignition system. To avoid possible damage to ignitor and/or coil, DO NOT allow tachometer terminal to become grounded.

Warm engine to normal operating temperature. Shut engine off. On Non-Turbo models, connect timing light to spark plug wire on cylinder No. 1.
On Turbo models, open cover located above the ignitor. Connect timing light lead to Green wire and to battery. See Fig 3. Ignitor is located near driver's side strut tower.
On all models, connect tachometer to proper terminals of data link connector No. 1, located in engine compartment. See Fig 1.
Apply parking brake. Place transmission in Neutral. Start engine and maintain engine at 2500 RPM for 90 seconds and then allow engine to idle. Ensure idle speed is 650-750 RPM on Non-Turbo models or 600-700 on Turbo models.
Install Jumper Wire (SST 09843-18020) between terminals TE1 and E1 of data link connector No. 1. See Fig 2.
NOTE: Timing marks are located on front cover.
Ensure base timing is within specification at idle with transmission in Neutral, electric cooling fan off, A/C and all accessories off. See the 6-CYLINDER IGNITION TIMING table.
On Non-Turbo models, if ignition timing is incorrect, loosen distributor hold-down nut. Adjust ignition timing by rotating distributor. Tighten distributor hold-down nut.
On Turbo models, if ignition timing is incorrect, check valve timing by ensuring proper alignment of timing belt. See the ENGINES article in ENGINE MECHANICAL section.
On all models, remove jumper wire from data link connector No. 1. Ensure advance timing is within specification. See the 6-CYLINDER IGNITION TIMING table. Remove tachometer and timing light.

6-CYLINDER IGNITION TIMING (Degrees BTDC @ Idle)

Application ⁽¹⁾

⁽²⁾ Base Timing

⁽³⁾ Advance Timing

Non-Turbo

8-12

7-19

Turbo

8-12

10-20

⁽¹⁾	Check with engine at normal operating temperature, transmission in Neutral, parking brake applied, A/C and all accessories off.

⁽²⁾	With jumper wire installed between terminals TE1 and E1 on Data Link Connector No. 1.

⁽³⁾	With jumper wire removed from DLC No. 1.

Fig 1: Connecting Tachometer Or Scan Tester

Fig 2: Installing Jumper Wire Between DLC No. 1 Terminals

Fig 3: Connecting Timing Light (Turbo)