ok there are 4 power 12v+ wires to my injectors, my resistor box only has one 12v+ in and 4 out. So what do I do with the 4 12v+ wires going to the injectors? hook them all up to the single 12v, or just hook up one and cap the other three?

 

I hooked all 4 up, but it's up to you. They're a constant power source, the ECU grounds the injectors to fire them, so just hook one or all four up to the power wire on the resistor box, and one of each of the other four to each injector.