Help problem polo!!
 

Hi, looking for some insight into my polo really. Its a 52 plate 1.4tdi with 108k on the clock. Up until a month ago the car was brilliant.. then i noticed it started missing now and again.. firstly i thought it was turbo related as i only seemd to notice it when the turbo kicked in, as soon as it happened it went again normally**weird**.. except yesterday... was driving along as you do and then boom engine starts vibrated like no tomorrow.. it was guttless and could barely pull away.. we managed to get 8 miles home wher we put the bonnet up and gave it a few revs .. no rattles or dodgy noises just vibrating like mad and limp as they come.. engine felt like it was missing,, boyfs dad said mayb a cyclinder or injection has gone.. going to get it plugged in to a comp this week, but does Anyone know what this could be??
Many thanks
Leah