TunerPro is saying "USE 4K Mat Selector" and the "USE 4K" part is in red which I suppose is an indication that something is not correct but I am not sure what? The engine was running and had been for ten minutes. The MAT sensor does appear to be at least partially functioning, the temp went from 75 deg to 84 in those 10 minutes it ran.
I think I have a failing fuel pump. While I was waiting to get my data cable I managed to read my fuel pressure and it was 26psi, the spec pressure is 41psi. In addition to wanting to know why TunerPro has "USE 4K" in red, I would be interest to know if anybody could see the failing fuel pump question in my TunerPro readings?
