Operation CHARM
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Buick
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1984
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Regal V6-252 4.1L
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Knock Sensor
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Technical Service Bulletins
Knock Sensor: Technical Service Bulletins
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Engine - Poor Performance/Driveability/Fuel Mileage
ECM - Knock Retard Data Stream Changes