Deceleration Fuel Cut (DFCO) Engine Speed Minimum Threshold Hysteresis

If DFCO has been enabled because engine speed became greater than Deceleration Fuel Cut Engine Speed Minimum, the engine speed must fall this amount BELOW Deceleration Fuel Cut Engine Speed Minimum in order to deactivate DFCO.

Higher values prevent DFCO from being turned on and off frequently when engine speed hovers near the threshold.