[Marwil]

Check your VE table. I have a partly similar set up - 3.0. SSI, Carrera intake. My MS 2 oscillates between 800 to 110 rpm too before fully warm still. Fully warm is not bad at around 1000 rpm. It oscillated all the time at Idle until I messed around with the VE table. I set a block of 6 cells at about the same value (about 45) and this improved the warm situation immensely.

If anyone has some killer advice on the idea oscillation thing both John and I suspect others would be quite happy!