05 wrx, Just bought some glowshift gauges, boost gauges works great but cant figure out the air fuel or oil pressure. what 02 sensor should i hook the air fuel gauge up to the front 02 sensor on the uppipe or the one on the rear cat, then on top of that there the heated 02 sensors, which wire do i hook them up to or is there another way? Oil pressure gauge, tryed hooking the new sensor in the place of the old sensor under the altenator and just got a reading of 100 most of the time didnt change, and the altenator wouldnt fit back on so cant use that, just wondering if there is another spot of something under the dash, need some help im sure theres someone on here that has hooked these up, please help thank you!