Hi I have a mondeo 2lt tdci on a 54 plate, turns over but wont start, you can bump start it and it runs very roughly then dies, also glow plug light flashing. Things I have changed already - camshaft sensor black to grey, crankshaft sensor, glow plugs, fuel filter. On restart car runs the minute you accelerate glow plug light flashes then dies, will restart, drive for a little while then same again, any suggestions would be appreciated, thanks Michael