Smells like a similar problem to robdf2
yep , simliar , mine was my intake cam being put back in about 20 degrees out of position , meaning the intake valves never seated , the compression was never right , and basically ran like a bag of sh*te !
But guess what SEAT said nothing wrong with my car !!!!!!!! grrrrrrrrrrrrrrrr
and the reason they said nothing was wrong is because there was not fault code logged , and without a fault code they wont investigate , absolute joke !
you got any photos Dom?
your car is like de ja vu to me mate.
Im still waiting to get my claim settled so i can post all the pictures and full story over on seat cupra.
getting closer now though its gone to VW legal department.