Hi all thanks for letting me join purchased a 2011 Audi A3 2.0tdi 140bhp a few weeks ago was fine but the last week or so when go out in the morning and drive for the first minute or so it splutters on and off but clears then fine rest of the day no smoke starts first time changed the fuel filter but still does it any ideas?? 

Many thanks

My advice is to take it back and let the dealer sort it out.

Hi cliff didn't get it from a dealer

 

So are you now responsible for putting it right? That could be expensive. There could be any number of things causing your problem so ideally you need to get a professional diagnosis. That will cost money, but will still be cheaper than installing new parts at random in the hope that you might cure it.