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Buick
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1982
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Electra V8-267 4.4L
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Description and Operation
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Distributor Reference Pulses
Distributor Reference Pulses
PURPOSE
The "R" terminal on the 7 terminal ignition module provides reference pulses to the ECM indicating engine RPM and crankshaft position.