Operation CHARM
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Buick
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1987
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Skylark V6-181 3.0L
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Engine
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Tune-up and Engine Performance Checks
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Ignition Timing
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Adjustments
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W/Distributorless Ignition System (DIS)
W/Distributorless Ignition System (DIS)
These engines use a DISTRIBUTORLESS DIRECT IGNITION SYSTEM. The ECM controls
ignition timing
and no provision for adjustment is provided.