Hi im having problems with my focus tddi, when on the way up to running temperature the oil light flickers and then on fully at running temperature, oil and oil filter change was about 2000-3000 miles ago, took it to the local garage and they said the switch is fine and had an oil pressure test done which confirmed low pressure, iv now had a new oil pump fitted and iv still got the same problem, the oil pickup doesn't seem blocked either. This could be coincidence but there is a lack of power as if the turbo isnt working even tho i can hear it and when idling there is alot of rattling. Any help is much appreciated.