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Home >> Buick >> 1991 >> Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4 >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Tune-up and Engine Performance Checks >> Ignition Timing >> Adjustments

Ignition Timing: Adjustments

This engine uses an INTEGRATED DIRECT IGNITION (IDI) system. The ECM controls ignition timing and no provisions for adjustment are provided.

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