dragracr1320

Ok, here goes, got the car already swapped bout a year ago, drove it 800 miles home, ran great for about 6months. It started missing, checked codes and all it was throwing was secondary oxygen sensor, fixed it even tho i didnt think that was the problem. Still didnt help, the car is wire tucked so i began looking at the harness itself, cut and hacked up all over the place, so i got a new harness yesterday, its a dx harness(couldnt find an EX harness where i live) did the iacv wiring and all that, drove the car this moring and ran great for about 5 mins, then started doing the same thing it was before, now its throwing code 9 cylinder postion sensor. any suggestions on the best way to fix or could it still be in the wiring? any help would be appreciated, thanx