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Home >> Cadillac >> 1999 >> Catera V6-3.0L VIN R >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions - Powertrain Systems >> Spark
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Spark

Range (-133 to 78 degrees)
This is the amount of spark advance that is commanded by the ECM. A positive value indicates that the timing is advanced, and a negative value indicates that the timing is being retarded.
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