not good with these..

[Midnightclub]

If it's the one i'm thinking of it does have 330d tips on it, at least the lad who had it built for him is convinced it does.

I'd suggest having a look at the lift pump for starters. Find out if the hp pump was refurbed if you can, i seem to remember it was a scrapyard job. If it's not a refurb that's probably the issue, but check lift pump first as that's a lot cheaper to replace and then easier to sell on if it doesn't help.

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And for anybody confused; the 330d pump is an r70 pump, however theres no point using it because it needs modding to fit and theres one that gets fitted to the 2.2hdis thats a direct fit.

I don't get this, it's essentially the same pump but in the BMW it flows over 200hp of fuel stock and can quite happily cope with 260hp. But apparently the 2.2 HDi R70 flows 17% more than a stock HDi 90 pump? But a stock 90 pump seems to be at it's limit at sub 200hp