Ignition Timing Adjustment

Ensure vehicle is at normal operating temperature, all accessories are off and transmission is in Park or Neutral. Front wheels must be in straight-ahead position and curb idle speed is set to specification.
Ground ignition timing adjustment connector Light Green/Red wire. See Fig 1 & Fig 2 . Check ignition basic timing. See the IGNITION TIMING table. Disconnect ground wire on ignition timing adjustment connector. Check ignition actual timing. Refer to the IGNITION TIMING table.
If timing is incorrect, loosen distributor hold-down nut and turn distributor until timing is correct. On 1.5L and 2.4L engines, ignition timing will be advanced if distributor is turned to the left and retarded if turned to the right.
On 3.0L engines, ignition timing will be advanced if distributor is turned to the right and retarded if turned to the left. After adjustment, tighten hold-down nut. Ensure distributor does not move when tightening hold-down nut.

Fig 1: Excel Grounding Ignition Timing Adjustment Connectors

Courtesy of HYUNDAI MOTOR CO.

Fig 2: Sonata Grounding Ignition Timing Adjustment Connectors

Courtesy of HYUNDAI MOTOR CO.

IGNITION TIMING (Degrees BTDC @ RPM)

Application

⁽¹⁾ Basic

⁽²⁾ Actual

1.5L

3-7 @ 600-800

10 @ 600-800

2.4L

3-7 @ 650-850

10 @ 650-850

3.0L

3-7 @ 600-800

15 @ 600-800

⁽¹⁾	With ignition timing adjustment connector grounded.

⁽²⁾	With ignition timing adjustment connector ungrounded.