lemon-mirror:
Home >> Pontiac >> 1990 >> 6000 L4-151 2.5L >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Ignition Timing >> Adjustments

Ignition Timing: Adjustments



This engine uses a Direct Ignition System (DIS) or Distributorless Ignition to control engine timing advance/retard. The Electronic Control Module combined with Electronic Spark Timing (ECM/EST) controls the ignition timing. The ignition timing is preset by the manufacturer, and no provisions for adjustment are provided.