4-Cylinder Ignition Timing

With transmission in Neutral or Park, start engine and warm to normal operating temperature. Ensure Malfunction Indicator Light (MIL) is off. Turn engine and all accessories off.
Connect jumper wire between Data Link Connector (DLC) terminals No. 1 and 3. The White 3-pin DLC is located behind right side of instrument panel. See Fig 1 . Connect timing light to No. 1 spark plug wire. Start engine.
Check ignition timing. See 4-CYLINDER IGNITION TIMING table. Increase engine speed to 1500-2000 RPM to read timing (if necessary).
Adjust timing by loosening distributor hold-down bolt and turning distributor. Tighten distributor hold-down bolt to 17 ft. lbs. (24 N.m). Recheck timing. Remove jumper wire from DLC and ensure MIL is off. Idle speed is automatically controlled by ECM.

Fig 1: Locating Data Link Connector (DLC) (Stylus)

Courtesy of ISUZU MOTOR CO.

4-CYLINDER IGNITION TIMING (Degrees BTDC @ RPM)

Application

Base Timing

Stylus

⁽¹⁾ 9-11

⁽¹⁾	With jumper wire installed in DLC, located behind right side of instrument panel. Increase engine speed to 1500-2000 RPM to read timing (if necessary).