I've replaced both offside doors on my mk3 Mondeo,?

I've replaced both offside doors on my mk3 Mondeo, (collision with woman in merc 4x4 - she didn't realise dashed white lines meant give way but denies being at fault ?????) I've reset my fuel cut off switch but the car will not fire up, it started once, but only for about a minute or so, then cut out, as though fuel line emptied and supply was stopped, I assume the pump is being isolated via the immobiliser or something similar, but ford say they don't know and would have to have a full diagnostic done, has anyone had similar or can you help, please, Thanks.