My 1995 disco 300 tdi has a problem at high revs, when acelerating upto 55-60 there is not problem, but trying to go any faster is an issue.
The car seems to loose power for a moment and the revs will drop off, if you keep your foot down it will pull through but really struggles.
My first through was fuel filter so that was changed but no improvment, could it be the fuel pump on its way out.
Any advixce would be greatful, the car runs fine apart from this little issue and has just flown through its last MOT with no problems.