Idle Speed

The ignition timing is computer controlled


***UPDATED BY TSB #G00190, JUNE 8, 1990

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 (telling you which side should be facing the spark plug), and the light does not flash or flashes only intermittently when clipped on one of the leading spark plug wires, simply reverse the pick-up (clip the pick-up on with the arrow facing the ignition 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

1. Check engine condition (spark plugs, leaks in hoses, etc.).

2. Turn all electrical loads "OFF."

3. Warm engine to operating temperature.

Fig. 37 Test Connector:

4. Ground test connector (Green: 1-pin) with a jumper wire.

ADJUSTMENT

1. Connect tachometer and check idle speed.

750±25 rpm

Fig. 38 Idle Adjustment:

NOTE: If the idle speed is not within specification, remove the blind cap, and adjust the idle speed by turning the air adjusting screw (see illustration).

Fig. 35 Timing Marks:

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 inlb (7.8 - 10.8 Nm) and install new blind cap.

6. Remove test connector jumper wire.