to tune it out of the PFC, (from what i have read) is to find the key load points when the idle is fluctuating and to halve the values.
It also said to make sure the valves dont go under 5, as then it wont run properly.
I didn't choose to go this route as through different sources i read this from, it said it was only a bandaid fix of the "FC Disease"
other people recommended to buy HKS EIDS to help with the idle, or to swap the PFC for another aftermarket ECU that has built in map sensor.
But yeah i believe its just my IAC thats affecting my minimal idle issue now. But i had drove my car last night and gave it a fair bit, parked my car and the idle didn't miss a beat or didn't fluctuate. So i iwill keep an eye on it.