As mentioned in my fault codes thread, the injectors are all showing an pen circuit. Could this affect the car enough to cause a misfire at 3-4k at around 3/4 throttle or above? Also, I found a melted connector plug for my N249 and the N249 itself has vanished. Unfortunately it's been left hanging at the back of the engine as I have obviously forgotten to cable tie it up and it's sat right against the block by the looks of it. Would the N249 not being connected be a possible cause of either the misfire or the charge pressure exceeded faults? I can't think of anything else, unless the map on the car is dodgy, but I have no way of knowing that. It definitely doesn't misfire at anything up to half throttle though. It can be quite severe too. I need to find the root cause of this issue. I feel like we are finally making some headway now.