Hi there. Yes I still need help with this.
Thanks for the response. I believe you are right with the idle speed learning. I came to the same conclusion eventually. I tried some recommendations such as just starting the car and letting it idle until it reaches operating temperature then turning it off, then turning it on again for about 10 minutes and that should do it.
I did do that though and I must say it has helped a bit. It idles almost fine now albeit a few hundred rpms slower than before. It still fluctuates but it's only when the aircon is running. So when I slow down for a red light I have to turn the A/C off temporarily.
I may try to disconnect the battery and reconnect then try the idling thing but with the aircon on. The ECU might compensate better for it that way. But somehow I think the engineers at Mitsubishi would have thought about that and mentioned it the manual.