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Home >> Pontiac >> 1987 >> J2000/Sunbird L4-121 2.0L >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Port Fuel Injection Models >> Function Selector Positions >> Knock Retard
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Knock Retard



The display indicates the number of degrees the ECM is retarding the EST spark timing.

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