I just replaced my thunderbird SC engine after doing the head gaskets and now the car will not start? It turns over and at first it almost sounded like it was going to start. Now it just turns over like the cam sensors gone? I am confident everything is hooked up correctly. This engine ran before I took it out. Here is my question. On the fuel rail harness there is a bigger rectangle grey plug,( (oval inside with three female plugs) near to the right where the EGR was. Can anyone tell me where this plugs into?