Ignition Timing

ADJUSTMENT

2.5L Engine

This engine is equipped with a Distributorless Ignition System (DIS). No adjustment is necessary.

3.0L Engine

NOTE: Ignition timing is set with the engine at operating temperature, transmission in P and all electrical loads OFF.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Connect a timing light to the No. 1 cylinder spark plug wire.
3. Connect terminals TEN and GND of the underhood Data Link Connector (DLC) with a jumper wire.

   Fig. 1: Underhood Data Link Connector and timing jumper — 3.0L engine

4. Check the idle speed. Idle speed should be 500–900 rpm.
5. Set the base timing to 10–12 degrees Before Top Dead Center (BTDC).
6. Tighten the distributor bolts to 14–18 ft. lbs. (19–25 Nm).
7. Remove the jumper wire.