I've got the same problem on my 130ps TDCi, i had the codes read and it was P1211 and P0251 - Injector pump metering control function. I've replaced the filter with a genuine ford one, checked fuel lines, replaced fuel pump metering valve, replaced fuel temperature sensor and had my injectors ultrasonically cleaned.. Still have the problem!!
The place that cleaned the injectors said there was some variation in fueling but nothing that stoodout! Only 1 of the injectors is original according to the correction factors on the rocker cover.
My next step i think is going to be to re code the injectors again and go from there.
The really strange thing is, i'm sure mine is temperature related as i don't seem to be able to do it untill the engine is warm but there is no codes to do with temperature!
Starting to consider a gallon of petrol and match now