I have just had a very annoying problem with my car not starting. Course of action was as follows:-
Car had problems starting from cold and the engine management light came on for 20 seconds then went out. When the engine was warm car started with no problem. Suspected glow plugs were faulty, after taking it to the garage one glow plug was faulty and the control relay was faulty and was cooking the glow plugs.
Glow plugs and relay replaced.
Got car back and still had problems starting it would turn over and took a while to fire up very jerkily starting. Suspected injector seals and run off pipes the problem was injector seals and were replaced as well as the run off pipes.
Went to pick up the car from the garage it started perfectly then stalled.
Restarted the car it turned over but would not start, after quite a few goes it fired up with quite a bit of smoke out of the exhaust.
Something still wrong. After an investigation by the garage over a week they discovered that there is a non return valve in the fuel pump. This was letting in air and the fuel was seeping back to the tank, this was why the car was not starting, they have just ordered the part and are expecting to fit it next week.
Will update this post next week with result.
From what I have read itís not good to keep starting the engine when the fuel leaks back to the tank. Can damage the engine.
So to conclude with starting problems:-
1)Glow plugs, EML comes on for 20 seconds then goes out.
2)Injector seals/return pipes, seems common problem, jerky / problems starting
3)Fuel pump non return valve, lets in air and fuel seeps back to tank.
(I think this is the a problem that people have not identified, because from reading posts they are replacing the fuel pump, sounds expensive and unnecessary or using other methods to get round the problem like using a Citroen hand pump non return valve between the fuel pump and the tank, to get the fuel back to the engine. Or just living with the problem)
Hope this might be of help to people so they donít have expensive garage bills.