I had that problem last winter.
It did turn out to be the leak off pipes... I think....I know nothing about cars but it was the small rubber pipes that run off the injectors, I think there are 3 and one bunged one, but I was having exactly the same problems, mine would start, eventually but not rev up at all and just cut out, drove me nuts, but I brought a set of pipes from ebay for a fiver and had them fitted. which cured it
sarah
December 2007