Hi. DT466 in a 4300 vin 5H123994. #5 & #6 injectors not working, wont buzz. Unplug # 4 and all will buzz except 4. Plug 4 into 3. Loss #1 & #2. Customer brought this to us and demanded we put in an ECM. WE did. Still have same problem. I am away for a ... Login to read more.