Aaron Bridges

So I have been fighting this lean condition for about 3 months now Ive replaced just about everything that could cause the condition in the first place. Fuel Filter, Fuel Pump, Intake manifold and all gaskets, Injector O rings, Check FPR and FR's all good Fuel Pressure is sitting pretty at about 39LB's only I haven't replaced is Injectors Wiring Harness and PCM. the problem is intermittent when I had it Dyno tuned it was kicking on and off running good then bad and so on and so forth. He said it screams electrical. I got a steal on a set of Harnesses Injector harness and O2 Harness, Some of My pigtails have broken over time anyways... How hard is the install of these harnesses? would it be worth 200Bucks to have someone else do it? or can I throw it in there in a couple of hours? Im going to Install the new Inj myself I'm just tired of ****ing with this thing. Im hoping the harness is the problem. also Just in case it isn't I got a PCM from a 97 would there be any problem aside from just having dealer install and reflash?