4-Cylinder Ignition Timing
- Ensure vehicle is at operating temperature, all accessories are off and transmission is in Park or Neutral. Set parking brake. Disconnect automatic parking brake release (if equipped). Vehicle front wheels must be in straight-ahead position and curb idle speed set to specification. Connect timing light to engine.
- On Probe non-turbo, disconnect and plug vacuum hoses at distributor. On Probe turbo, ground STI test connector. STI test connector is a single Black connector located at left front strut tower.
- On all other models, disconnect single in-line Spark Output (SPOUT) connector near distributor in harness to TFI module. Wire color of SPOUT connector is Yellow/Light Green.
- On all models, start engine. With engine at timing RPM, check base ignition timing. See 4-CYLINDER BASE IGNITION TIMING
table for specifications. Turn engine off. Reconnect vacuum hoses, wires or remove ground wire. Check ignition computed timing. See 4-CYLINDER COMPUTED IGNITION TIMING
table for specifications.
4-CYLINDER BASE IGNITION TIMING
| Application And/Or Calibration Code |
(Degrees BTDC @ RPM) |
| 1.9L TBI |
10 @ 760-840 |
| 1.9L PFI |
10 @ 900-1100 |
| 2.2 PFI |
| Non-Turbo |
6 @ 750 |
| Turbo |
9 @ 750 |
| 2.3L OHC |
| 8-05A-R10 & 8-06A-R10 |
10 @ 770-830 |
| All Others |
| Auto. Trans. |
10 @ 790-850 |
| Man. Trans. |
10 @ 820-880 |
| 2.3L HSC PFI |
| Auto. Trans. |
15 @ 690-750 |
| Man. Trans. |
15 @ 820-880 |
| 2.3L HSC MA PFI |
| 9-25C-R10 & 9-26D-R10 |
| Auto. Trans. |
15 @ 680-760 |
| Man. Trans. |
15 @ 810-890 |
| All Others |
| Auto. Trans. |
15 @ 690-750 |
| Man. Trans. |
15 @ 820-880 |
| 2.5L TBI |
10 @ 675-725 |
4-CYLINDER COMPUTED IGNITION TIMING
| Application |
(Degrees BTDC @ RPM) |
| 1.9L MA PFI |
31-34 @ 950-1050 |
| 1.9L TBI |
17-22 @ 820-900 |
| 2.3L OHC PFI |
16-22 @ 850-900 |
| 2.3L HSC MA PFI |
3-14 @ 830-880 |
| 2.3L HSC PFI |
17-19 @ 840-880 |
| 2.5L TBI |
22.25 @ 820-850 |