cars not very well pulls great to 3000 revs but then theres an awful vibration from the engine and a lack of powerful acceleration. for a 2.2 very slow, some think egr if so got a blanking plate, but do you have to get it remapped?

Some think its a valve sticking, while ive been told it could be fuel related, surely someone out ther must have had the same problem and knows what it is PLEASE.