Hi guys, ok so I leave work today the car feels normal. So I decide to overtake a truck, I pull out to overtake and I feel " as if " a pipe or something came off because as soon as the car started to spool it lost power and started to judder. So I drove to the next service station to see if there was anything noticeable. All IC pipes are in place, and nothing obvious seems to have came off. The only thing I can point the problem to is something to do with the turbo/exhaust. My symptoms are as follows: 1) Serious jerkiness when trying to accelerate over 3,000, as if the turbo is spooling but the air is hitting against something so it vibrates and the whole car shakes like I've never felt before. 2) More engine vibration (than before) when idle (sits at around 800 but is not as stable as before so it keeps on reving it self a bit) 3) The exhaust note has DEFIANTLY changed, it's as if I've got something stuck in there. The exhaust has changed from sounding free flowing to as if its a tractor (no joke) it now sounds as if my exhaust has a huge hole in it, but all the welds and joints up to the sport cat seem fine. So Does this sounds familiar to anyone? Anyone had this problem? I thought it could be the coil pack, as I haven't changed mine yet and recently remapped the car, but can a coil pack make that much change to noise in the exhaust? P.S. I get an engine light only when trying to get over 3k and when the car starts to shake, when I slow down the engine light goes off.