Hi all. Yes, this is my first post but i have done a ton of reading, researching, and even ponied up and bought The Tuning School material so i can learn how to tune on my own. I am running into an issue and dont know where to look.
I have a 2006 GM 5.3 swap. I have it to where it idles pretty good but i was trying to do the VE and MAF tuning steps when i realized i am not getting any O2 % readings. it is showing voltage but not % on either LTFT or STFT. I have gone step by step though the VE and MAF tuning sections to get into the closed loop mode but I cannot figure out why i cannot see any % readings.
For what its worth, the standalone harness I bought came with the flat 4 prong O2 sensor plugs so i bought 2 brand new GM O2 sensors that had the same flat 4 prong connector. So the harness and O2 sensors area new. Hopefully this is somethings simple and stupid I have overlooked.
Thanks for any input.
VCM pics and tune attached.
VE and MAF TTS.hpt