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Buick
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1991
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Century V6-204 3.3L VIN N FI
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Ignition Timing
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Adjustments
Ignition Timing: Adjustments
This engine uses COMPUTER CONTROLLED COIL IGNITION (C3I) system. The ECM controls
ignition timing
and no provisions for adjustment are provided.