Ignition Timing

NOTE: Excel is equipped with a dual diaphragm distributor and will not have an ignition timing adjustment connector.

Ensure vehicle is at normal operating temperature, all accessories are off and transmission is in Park or Neutral. Vehicle front wheels must be in straight-ahead position and curb idle speed set to specification. For Excel models, go to next step. For Sonata models, go to step 3).
If adjustment is performed at high altitude, disconnect vacuum hoses from distributor and plug. Leave hoses connected at low altitudes. Check ignition basic timing. Connect vacuum hose to distributor. Check ignition actual timing. Refer to IGNITION TIMING table in this article.

Ground ignition timing adjustment connector Light Green/Red wire. See Fig 1 . Check ignition basic timing. Disconnect ground wire on ignition timing adjustment connector. Check ignition actual timing. Refer to IGNITION TIMING table.

Fig 1: Grounding Sonata Ignition Timing Adjustment Connector

Courtesy of HYUNDAI MOTOR CO.

IGNITION TIMING (Degrees BTDC @ RPM)

Application	Basic	Actual
1.5L	3-7	3-7
2.4L	3-7	10

If timing is incorrect, loosen distributor hold-down nut and turn distributor until timing is correct. Ignition timing will be advanced if distributor is turned to the left and retarded if distributor is turned to the right. After adjustment, tighten mounting nut. Ensure distributor does not move when tightening mounting nut.