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Home >> Chrysler >> 2012 >> 300 C, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (6.4L - DTCS P0202 To P0521) >> Diagnosis And Testing >> P050B-Cold Start Ignition Timing Performance >> Theory Of Operation

Theory Of Operation

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Spark adjustment during a cold start is intended to provide quick response to idle speed variations. The Powertrain Control Module (PCM) monitors spark advance on a cold start over a period of time, then compares the average spark advance to a threshold.

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