Fault code P0300

Having trouble with vRS mk1.

Runs o.k. until I give it some accelerator then it starts to judder at about 2000 revs, although it also does it at lower revs and speeds.

Any ideas? looking at some of the other topics on the forum their descriptions sound like mine.

Coil pack maybe?

Been running round just lately at about 20mph on the snow and not had a good run out.