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Home >> Jeep >> 1993 >> Grand Cherokee Base, 5.2 Y, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation - 5.2L >> Ignition System >> Ignition Timing Control System >> Notes

Ignition Timing Control System: Notes

The Powertrain Control Module (PCM) completely controls ignition system. During a crank/start mode, PCM will set a fixed amount of spark advance for an efficient engine start.