Does anyone who has put comments on this post understand current flow in D.C.(Direct Current) circuits? If I understand(edited) the operation of the electrcial operated injectors on EFI systems they pulse the negative(battery) side of the injector
with -5.5 volts, correct , ? If so then doesn't all the elecrtons need to return to thier source to complete the circuit?(make the injectors pulse) That being said you might want to follow the instructions from the manufacture to the T