Car bogs down like its out of gas

Oh one more thing that I thought about. I installed my stereo because hearing the rattling was killing me haha. I have a toggle switch for the fuel pump and one side of the toggle has a constant 12 volts and I added my stereo into the constant 12 volt side. Would this be reducing the voltage enough that the pump isn't pushing enough fuel pressure? Just going through everything that's a possibility. I don't think this is it but not sure