Hunting issue

[totta Crolla]

Freedom has a basic water temperature fuel correction for cold start and running I'm not sure about timing, something I can check.
Certainly I can replicate a hunting idle by using different 'on idle' and 'off idle' points, a setting that allows TPS IDL switch tuning.
Freedom Idle ignition timing can be set and will not change as long as the IDL switch is engaged, as soon as it goes off idle the ecu uses the normal ignition map. There is no specific idle fueling, it just uses the normal fuel map.
If the stock ecu has the same strategy and the IDL switch is not engaged it is possible for the idle timing to jump around the ignition map and a change here will effect the engine speed and fueling.