2014 ram 2500 original ecu had antifreeze contamination (black pins) also deleted mds with new cam and lifters. Issue is I got a used ecu (was told same year and model, vin # 3C6UR5djoeg272470m and OS of 68153870AI). original ecu vin 3C6UR5CJ7EG287565 and OS of 68153870AM. So here is the run down. With used ecu the the fuel trims get pegged rich, (oem ecu fuel trims are fine fine). I compared the two ecu's and made all the changes I could even the dtc's, how ever after loading updated used ecu to match the oem ecu. Thing still goes fat. possible OS issue or maybe used ecu is junk. all o2 data shows lean and fuel trims rocket just a few mins after starting and after cl kicks in I will post logs and files here shortly. just wanted to get thoughts on this , not new to hp tuners (mostly gm stuff) but new to dodge ram and 6.4 stuff. any thoughts are welcome. and thanks for reading.