as above make sure when cranking you have at least 240 bar if you havent the ecu will not even turn the injectors on electronically, removing and fitting common rail injectors are very easy to block especially delphi injectors you have in the mondeo, you have to be so clean, making sure no dirt goes into the inlet of injector, other wise they will become blocked or have very high backleaks, which would causee bad starting or no starting, due to the pressure being lost via the backleaks, i overhaul delphi common rail injectors as my job, there is a 2mm valve in diamater that has to move micron in miliseconds, any dirt or debrais droped in the inlet of injector will seize that valve within seconds upon fitting, best of to check the fuel pressure while cranking, if it is not near 240 bar i would get the injectors out and get them tested, we can do them at my work www.colfuel.co.uk we have all the proper equipment to overhaul and put through a thorough test that at the end will give you a new 16 digit c2i code that you will have to interpret into the cars ecu via a diagnostic tool. This code gives optimum performance and best mpg and generally better driven engine.

Hope this helps

Kind regards

Daryl