Ignition Timing: Adjustments

NOTE: Base (initial) ignition timing is NOT adjustable. Do not attempt to adjust ignition timing by rotating the distributor.

All ignition timing functions are controlled by the Jeep/Truck Engine Controller (JTEC).

A DRB or equivalent scan tool may be used to verify base timing and electronic timing advance. Refer to the Scan Tool instructions for procedure.

Fuel synchronization can be verified and set by rotating the distributor. Refer to the Distributor Removal/Installation/Checking Distributor Position.