Plug and play refers to the installation process. You remove the plugs from the injectors, plug them into two of the plugs coming from the TFI and the other two from the TFI go on to the injectors where you removed the first set of plugs from. Connect a ground wire and adjust the unit and you play then.
The plugs are male/female so you can't make a mistake. Just keep them to the proper cylinder/injector they came off.
The plugs are male/female so you can't make a mistake. Just keep them to the proper cylinder/injector they came off.