Got a similar issue in work we can't seem to fix, it struggles to rev right up the range, then when you let it idle it will just cut out, try to move it and it will just cut out. Changed fuel pressure regulator and that seemed to cure it. Well for 40 or so miles and now its back to its same old tricks!

If yours isnt cutting out i would try the regulator, its on the back of the pump quite easy to change, about £120 from euro car parts but they won't find it on their system with a reg number, they need the part number off the old part.