I just read a page saying I dont need a resistor box for the b18b1 swap into a DPFI EF9 . So do you know for sure if I need one or not?

 

no you don't need it. It is High Impedance injectors. Thus not requiring the resistor box.

 

even if im running it on OBD0?

 

yes even obd-0.... you need to solder the injector power wires together to the one red wire going into the resistor box. Take all 4 of the injector POWER wires, and solder them to the ONE RED POWER wire going into the resistor box... that is all you have to do... now you can run obd1+ injectors if you wish to do so.

 

that is if you are running an obd0 ecu and obd1 or 2 injectors. OBD0 injectors WILL NEED the resistor box

 

motor and ecu is going to be obd0...dizzy,alternator,intake mani, and ecu
so I need a resistor box then rite?

 

if you're using OBD-0 Injectors they yes.