I don't think that the wiring harness has problem. if i stop the car for 5 a 8 days some times when i take it run very well the first 2 minutes, but it starts failing again. at the beginning a have to start it more than 3 times because it works for couple minutes and stop again. I don't know but may be the fuel pump don't have enough pressure or the pressure regulator is bad or some injector is not reading. what do you think?