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Home >> Jeep >> 2004 >> Grand Cherokee Overland, AWD >> Repair and Diagnosis >> General Information >> Specifications Index >> Common Specs & Procedures >> Ignition System >> Ignition Timing
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Ignition Timing

NOTE: Ignition timing is controlled by Powertrain Control Module (PCM). No adjustment is required.

Ignition timing is nonadjustable. DO NOT attempt to adjust ignition timing by rotating oil pump drive shaft assembly (4.0L). If oil pump drive shaft assembly is rotated or replaced, fuel system synchronization will be changed.

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