Hatchbaby

I was trying to put a cd player in the nissan. When i finish the car started but it wouldnt do more then idle. it would shut off if i pressed the gas. I checked the fuel filter but it was good and the only thing i noticed was that the power wire to the reciever in the back and the reciever under the seat was connected to the old tape player. The fuel pump was wired to the reciever and also the meters and dash and the power windows. What can i do to wire so it'll run right?