Hello,
there are more topics regarding this, but might be that I have some strange problem.
Bought Defender 110 two weeks ago and last Sunday tried him on offroad.
Came back home, and Monday morning I couldn't start it.. Had to do a pull start and it started to go.
The feeling was that it was runing on 4 cylinders only.
Things done: cleaned red plug on the ECU, changed injectors wiring, O rings on injectors, made injectors adjustments, changed fuel filter. Fuel pump seems to be ok.
Now the car starts really fast but i got another problem. Really rough work of it.
Do you have any ideas where to search now?

Sounds like you got an exhaust blow there, and is that where the smoke is coming from?

Nah, it's me who was smoking
Engine calms down when it gets to normal working temperature.
But its now a big question where to search for problems..

Have you any means of reading faulty codes? Nanocom, Hawkeye or similar? It might be possible to detect something out of line in cylinder balance values. Or some other stored fault code.

Injector knackered I reckon mate