TuningIgnitionTransient Ignition Accel Sens Table Ign Accel Sens Table Control the amount of Ignition Accel Retard for a given Rate of Change. Ignition Accel Retard = Rate of Change x Sens. Example: dTP1 = 5.0%/sec Sens = 4.5 Ignition Retard = 5.0%/sec * 4.5 = 22.5 of ignition retard.