I have a 04 f350 superduty with 6.0 powerstroke diesel that was running fine. It started getting a rough ride around 45-60 mph, so i changed the #8 injector and everything smooth out for about 2 months. Was running good at this point until my wife drove it to a family members house, cut it off went in and came right back out and it would not start have run battery dead twice trying to get it started. i ohmed out the glow plugs and getting good readings on all but #7, have check and getting food fuel to filter on engine but still no start. I spray a lithle ether in it and it started up and idled fine but when i cut it off again no start. Can somebody please help me??

I have a cheap scan tool and have hooked it up but haven’t checked actual values or if it will show the values but i know its not showing any codes. The sensor is on valve cover on passwnger side right beside the module for the glow plugs. My radiator was leaking also and i have pulled it and waiting for repairs to be made on it. I hope to get it back in in the next day or so but was hoping there was something i could do while i wait