Ignition Timing: Adjustments

NOTE: On this distributorless ignition (DLI) system, the leading ignition coil discharge is bipolar -- one plug wire terminal is negative, the other positive. If the inductive pick-up on your timing light has an arrow indicating polarity (which side should be facing the spark plug) and the light does not flash or only flashes intermittently when clipped on one of the leading spark plug wires, simply reverse the pick-up (clip pick-up on with arrow facing the coil rather than the spark plug). The light should now flash with each coil discharge. If not, check timing light operation on a conventional ignition system.

PREPARATION

Fig. 37 Test Connector:

1. Check engine condition (spark plugs, leaks in hoses, etc.).
2. Turn all electrical loads "OFF."
3. Warm engine to operating temperature.
4. Ground test connector (Green: 1-pin) with a jumper wire.

ADJUSTMENT

Fig. 35 Timing Marks:

1. Connect tachometer and check idle speed for 750 ± 25 rpm.
2. Connect timing light to high-tension lead of front leading side. Check that mark on pulley (yellow) aligns with indicator pin.
3. Connect timing light to high-tension lead of front trailing side. Check that mark on pulley (red) aligns with indicator pin.

LEADING:

5° ± 1° ATDC (Yellow)

TRAILING:

20° ± 2° ATDC (Red)

Fig. 36 Crank Angle Sensor Adjustment:

4. If adjustment is required, remove blind cap, loosen lock bolt and turn crank angle sensor.
5. Tighten lock bolt to 69 - 95 in lb (7.8 - 10.8 Nm) and install new blind cap.
6. Remove test connector jumper wire.