Ignition Timing
- Install timing light with adapter between No. 1 spark plug and No. 1 spark plug wire, or use inductive pick-up. Do not puncture wire. Run engine until it reaches normal operating temperature.
- Electronic Spark Timing (EST) must be in Bypass Mode to check ignition timing. Ground terminal "A" to "B" at Assembly Line Diagnostic Link (ALDL) connector.
- Place transmission in Neutral (man. trans.) or Drive (auto. trans.). Set average timing of cylinders No. 1 and No. 4 to specification. Adjust if necessary.
IGNITION TIMING SPECIFICATIONS (DEGREES BTDC @ RPM)
| Application |
Man. Trans. |
Auto. Trans. |
| 2.5L |
8 @ 650 |
8 @ 650 |