okay i recently got a 2004 mach 1, it has a modifyed 4.6l v8 in iit, but when i got the car there was no ecu in it at all, and no keys, so i found a ecu, with the cluster, the ignition and the key but they came out of a 03 cobra, so after puttig all the new parts in, the car still has no crank or start and no my theft liight is flashing and the car is not doing anything, the fuel pump isnt turning on or anything what do i need to try next?? do i have to have the whoe car reprogrammed or what