van cuts out?

i have a 53 plate citroen berlingo van 2.0 hdi, it has an intermitant fault, it starts great, but when i try to put on some revs, it cuts out, it will then turn over ok and ticks over lovely until i rev again, then it cuts out, this may go on for 10-15 mins then suddenly it will be ok and it drives perfect and it will be fine for a few days, and then do it again.
i had a new crank censor fitted after a diognostic test and it was ok for about 8 weeks, then started again.
any ideas please

phil
January 2010