Hello, I am new here and still getting familiar with how to use this site. Please be patient. My quick account: I have a1991 BMY HARSCO FLATBED CARGO TRUCK, M923A2, CUMMINS 8.3 with about 12,000 miles on it. A couple of months ago it ran fine. I went to start it about two weeks ago. It would turn over but not fire off. I checked the fuel and found it to smell bad, almost like bad gas, i.e. shellac or turpentine. Fuel if getting up to the brass screw behind the injectors but none to the injectors themselves. I drained over fifty (50) gallons of the fuel and cleaned out the fuel system, then filled the filters with red heating oil fuel and pumped the new fuel through the lines. I am now getting the new clean fuel at the line into the injector pump and the return line. Still no fuel out of the injector line. Can anyone help me, please? Am I doomed to an injection pump re-build? Thank you for any assistance!