Jaxryan

Hi everyone i need some help please, so my 2003 g35 was running perfectly fine but had some oil leaks, so i went to fix the leak and while disconnecting the camshaft position sensor bank 2 the harness crumbled. So i ran to a scrapyard near me who had a few 03 g35s like mine, so i have all wires color coded correctly and i double checked with my hayns manual as well as nicoclub manual and everything is correct. So now when i go to start my car it takes more cranks to start, some times the car will start with no cel, and other times after cranking a while cel comes on with p0345. I put new sensors in and still same thing. Is there anything i can do to fix or do i need to just go grab a new harness from a junk g35???