I installed a set of DD stage 2 injectors in my 12 valve. One injector is leaking, and I have been unable to stop it. I have pulled it out twice cleaned the bore, and reinstalled it with new copper washers. I also replaced the return lines, and I still have a small leak. I do not think it is the return line or the high pressure line. Could I have a bad injector? I have tried everything else.


