here's what fixed my problem i thought i'd post a reply after gleaning soo much info from others and share the solution that fixed my problem, this may be long winded but hope it helps someone else stay away from the bean stealers i was having problems after cruising at a steady speed...

hello my first post here so hello to all a huge thank you to all who contributed to the previous threads regards loss of power on a 02 plate TD4 92k at around 70mph/3000prm i had just started to exprience exactly the same syptoms almost word for word of previous posts, after reading and reading...