hey guys just got a 2015 ats coupe 2.0t a couple of months ago .i am familiar with hptuners i was tuning n.a. chevys for a while. but i have never encountered o2 not moving negative trims in long and short term.i have changed o2 sensors checked fuse,went back to stock tune and none of that made a difference.under special functions i reset ltft.now i mentioned this for a reason i dont know if this car has e85 capabilities.i have read where some cars have e85 sensors in them but i realy cant say i have seen one. i do run e85 50/50 mix and the car loves it.but i am wondering just now if e85 is causing this.??have 3/4 tank of it.thanks for any replies. also as a side note what areas do i need to address to increase boost???
Reply With Quote