What actually helped me that was recommended by my tuner (CD919), before I started to log was to change my downstream o2 sensor. That may have been my problem with a CEL popping up.
Got this bad boy , mirror tapped it, and mounted it!
Mirror Tap wires: https://www.amazon.com/dp/B0D2L3XTBC?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1
Mirror Mount: https://www.amazon.com/dp/B0BYXMFVFT?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1