Thaks Kanman , Im not sure what you mean by checking the oiling of the injector. How can you tell? I replaced the right side harness but not the left. It was throwing a #8 glow plug code. Replace the gow plugs then the harness. Solved the problem. It is such a slight miss I dont think an injector is not working. I have not scanned for codes yet I will in the next couple of days. If anything shows up on the left bank I will replace the harness and go from there.