Ok...I have a question.....I check again with the multimeter and I found between 12-14 volts in one wire of the plug to the injectors...But my question is if the another side ( wire) has to be a ground......because when....I try read the volts in the plugs of the injectors.. I dont read nothing.... But when I check one wire with power(12-14 v) with the multimeter and I put the another wire to the grounds( chassis,engine) read good......so that question is if the one side of the plugs to thE injectors has to be a ground? or how this work?