I had a uk2000 engine and ecu in me car a few months ago ' i recentley bought a sti engine , 440 injectors ; orange maff .vf28 .larger intake for maff in other words a full sti conversion to swap the uk engine .turbo and ecu out , after fitting all the above gear we fitted the s6 sti ecu and the car would not start, so we pluged the uk ecu bk in and the car started and would drive, but was holding bk , i dont want to drive it like this as it risking damage the engine, so the problem is the sti ecu is not letting the fuel pump start the car , iv tried looking up on the net, and there seems to be a fix for this but no step by step guide thats easy to follow, i thought it was going to be a simple plug and play ,but with me its never the case any help with any experince or if anyone cud do it for me plesse help i want me car back lol 8 months now engine is a v4 sti ,the old engine was uk2000 97 thanks