ive just converted my 2003 blobeye wrx into a 2.5 6speed from a 2006 spec D,ive put the spec D loom in , i bought a spec D ecu with matching immo ecu & transponder key, but the car turns over but wont start, can anybody tell me do i need them all coded with clocks and body intergrated module before it will start? or should it start with matching ecu&immo-box&transponder key,?i would be gratefull for any help,

 

Sounds like it might not be seeing the crank position?
So its also had a full EJ257 engine fitted with all of its sensors?