hey i have been having problems with my rs turbo for awhile i have changed every thing fuel pressure reg plugs leads fuel pump u name it and still not running untill i unpluged this little black cube no bigger than 5 cm in lenght and 2 cm high with 3 wires coming out of the top one brown one yellow one brown/yellow pn is v90fb-12b509-aa its a ofab wiring loom does any one have any idea what it is and what it does ??