It might be pulling in air in the fuel lines somewhere.Check round the sedimentor for signs of diesel and the fuel sender pipes under the panel in boot floor. Very common in old Disco's.
ok thanks every one for info its just strange how it only dose it when its up to running temp i will get under it 2 mora and have a good few hours on it and keep you all posted
you can check if its air in the fuel line by fitting some clear pipe between the filter and the IP. saves a lot of head scratching and quickly shows if that is the problem or not so you can move on to checking other bits.
