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Home >> Chevrolet >> 1987 >> Cavalier/Z24 V6-173 2.8L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Function Selector Positions >> Knock Retard
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Knock Retard



The display indicates the number of degrees the Electronic Control Module (ECM) is retarding the Electronic Spark Timing (EST).

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