Yes I am aware that it should of had a full mini service history and come from a reputable dealer, but none the less I didn’t, the issue l have is that I have replaced The vanos sprockets and valves the timing chain various sensors map o2 eccentric shaft, due to timing issues and various other faults, I now have a p1105 pressure differential fault ( map replaced) any ideas as to the cause, ( I have replaced the stem seals due to smoke they where buggered) is it possible that the cat is faulty, please no lecturing