Hi again, my car has infamously thrown another hissy fit, SO after a month or so of driving fine I got my stuttering back again at high load. Ive read with my Memoscan that has given me these code; P0117, P0420 (I have decat), P0321 & P0322. I have changed the crank & cam sensors already once after lots of issues similar to this, then I had a boost issue & I have changed the MAP sensor which cured this completely, and its all started again, any suggestions?