Wiring jb4 purple wire to obdIi


New Member
Nov 12, 2022
I have a 2022 bmw m4 competition coupe xdrive.
I have purchased from fuel it , a port injection kit with the pi controller, i also have the jb4 tune in as well. I am
Having issues on where to put the purple
Wire. Instructions from fuel it say purple wire , pin 3 of jb4 obdII to pin 4 , what does that mean? I cant seem to get a solid answer from support and am very aggravated, what should be simple is taking forever, and i am good with wiring, but this has me stommped. Please someone help, how to wire the. Purple wire on the jb4 obdIi?