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Home >> Chevrolet >> 1999 >> Tracker 2WD L4-2.0L VIN C >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Vehicle On-Board & Scan Tool Diagnostics >> Engine Scan Tool Data Definitions >> Spark
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Spark

The scan tool range is -1 to +60 degrees. This displays the PCM controlled value that is being used to control the spark timing.
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