hi all i have a 95 disco 300tdi auto with a throttle problem witch is when on full throttle it gets to about 40-50 then starts to stutter then go's again then stutters then go's again its just like your running out of fuel if you back of the throttle then it gos ok up to about 70 then it starts again if your on a steep hill its worse ie happens at lower speeds i'v have a new fuel filtter new lift pump and the sediment bowl has been empited has anyone got a clue as i'm well fedup thanks