Well i replaced the Knock sensor and all was well, took it out for a spin and no light, MINT!!! Then i come home, open the bonnet to find oil sprayed everywere!!!! i dont tink its the headgasket because most of the oil was on the rocker cover next to the PVC valve, and the other one were i have a pipercross breather on there. I've had a quick look around the head but nothing as far as i can see, its abit hard to look around the back, so i cleaned it all up, and let the car idle for 20mins, no oil came out anywere that i could see, so i took it for a quick spin again, and small amounts of oil by the breather and PVC valve. Im guessing its not breathing correctly?? I've upped the boost slightly and have the front mount on now, but wouldnt have thought that to have caused it?? Also the PVC valve is abit stiff?? Anybody have any ideas??