Yep, when I hit full boost she goes bang, and I mean bang! Basically, when the engine is under load and I floor her there is a loud bang from the exhaust and it feels like I just hit the brakes because the engine goes dead. It's almost like it's hitting a boost limit. A load of dark grey/black smoke came out the back aswell. To me, this says it's an ignition fault, but as it's dark there's no point in me looking tonight. First thing I will do is check the plugs to see what's going on, but after that I'll just check anything that is ignition related. Any ideas?