Hi there fine people of the hpt forums, I will start of by saying I am really new to the hp tuner thing, and I am like a sponge when I can see and understand whats being done, thing is values in vcm while logging are hard for me to understand, I here have a 1987 chevrolet that I rebuilt from nothing basicly, and put in the most common stuff in there, my cam is the elgin sloppy stage 2, has 585/585 lift 112 degrees, the motor has not been to a machine shop but!! the the best of my basic knowledge on rebuilding engines, things were really in great shape and did not need a whole lot if any work done to in by the looks of it, now for the fun part, I have leak tested the engine and perfomed a compression test after the engine ran a while, 150 psi across the board and no leaks to be found vaccum or exhaust, wiring wich I have done myself with the help of the interwebs was triple tested, continuty and signal coming from and going to pcm, o2 sensors are brand new bosch units, thing is I cant have a normal stft reading, when engine idles my bank 2 sensor is showing -35 and bottoms out!, on part throttle it looks ok but why is my bank 2 sensor showing negative instead of positive? when I tune I tune with everything off, maf, stft, ltft, pe, dfco, fuel cutoff etc like it is said almost everywhere i look, my base ve looks to be ok when in OL, running 13.5-15 afr all across the board, but then when i try turning stuff back on thats what happens, then I run super lean on part throttle cruising and bank 2 is way in the negative, I will provide here my current tune file and the last 2 vcm scan performed while cruising around, first will be a VE tuning file, with fuel adjustments in mind, then second one will be with all back to normal , still having issues with my maf but still needs adjustments there, and I thank you guys in advance for the help, it has been a long process to learn from all sorts of sources, but I20-07-07 20-43-50.hpl20-07-07 19-21-46.hpl6.0 c10 ve maf on after ve tuning.hpt6.0 c10 ve maf off.hpt really need to have the right information to keep moving,