This is a perplexing one. Mate's Defender 90 fitted with a Disco 200tdi lump has lost power, we have replaced the fuel filter and the lift pump, but this has not solved the problem.
The symptoms are that it will start and run, it will drive up the road about 200 yards, and then it loses all power, similar to a lift pump fail, nothing but tickover available, not even foot flat to the floor.
The fuel lines are clear, the tank looks clean (the pick up pipe was removed and cleaned yesterday) and the filter is new.
When the lift pump was replaced last, the new one came with a spacer block, this was intially fitted, but then removed as the cam wasn't operating the rod, without the spacer, the pump operates fine.
We also have a clear inline filter fitted, and you can see the fuel pumping into this, however, when you drivbe it up the road, it goes fine, then loses all power.
Any ideas guys n gals????