Hi i know you guys prob heard this question a million times but here goes.I recently swapped the engine in my 2001 ford escort 1.8d van..I pulled the old engine out and the local pikey scrap men decided to swipe it before i had the chance to take the pump off.I managed to find a replacement pump from a 99 escort van...but heres the prob

It wont bloody start lol (ive got ignition lights etc)

I know that the immobilizer is on the fuel pump on these things and obviously my key is coded to the old pump which is lying in a scrap yard somewhere.

what i really need to know is how i can bypass the immobilizer to get the thing running

I would really really appreciate your help

thanks in advance Andy