Hello, I`m trying to diagnose a fault. Over the past couple of weeks i have noticed a wooshing sound coming from behind the passenger footwell. Today whilst driving at around 30mph in 3rd there was a bang, sudden engine braking and loss of power then the car was juddery on low revs. There`s quite a lot of white smoke when reving but none on tick over. No engine management lights have come on. The cars only done 25k with full service history, last one done in Oct 10. Has the turbo gone? Has a hose come off? Your thoughts and opinions would be much appreciated.