I just put a mass air from fiveology racing. In my 95 f150, my truck is a fleet model and didn't have a mass air on it. I get a code 157 that wont go away I have 12v on the power wire and tried 3 sensors. Any idea where to go?

 

Have you measured the mass-air voltage? It should be .8-1.1 volts or so at idle.