Ok, when i bought Golf GTI car (thats what my 2 and half year old boy calls it, the 2011 Fiat Punto is the poo car) It sounded like the exhaust was blowing from somewhere.
Had it up on the ramps and couldn't find a leak in the system but from cat on it wasnt really check. When driving along with the foot down it sounds a bit like an old air cooled, fast changes causes hesitance for half a second.
any ideas guys???