i am building a kit car and using a 13b s5 single turbo motor. i am using the stock ecu to keep me from buying another aftermarket. i got the coils wired up and the engine starts when i spray fuel into the intake, but not without so im guessing the injectors are not working....what makes the injectors work and what sensors are needed? since i am missing alot of sensors and such i need to know what i need for the injectors to work.....