My ecu was sent back to msd to be tested and they assured me it was fine when plugged into another cosworth running wasted spark only way I can see that I'll figure mine out is to fit a standard loom ecu cool etc get it running that way and then fit the wasted spark back in and see what's up, I honestly don't find this a great piece of kit ATM as most say it is and I see more and more threads on forums about this kit not working