i have a 1995 fiesta si with series 1 engine fitted i am wanting to fit an ofac but believe i need too change a pin or remove one??? it is currently running rich as it has the si ecu and i had to disconnect the cold air sensor to gain better fuel delivery also got a turbo map sensor to fit once the ofac is hooked up !! can anyone tell me which pin it is or what i have to do to get it running right??? will the ofac affect the pats system??? please help