Follow up with some things I remembered:
1. I cleared adaptations several times.
2. I did not replace the ISCV gasket in the intake manifold. I will order one on my next parts order. The old one seemed fine but I did not remove it from the manifold to inspect closely.
3. I swapped back to the old MAF with no change in symptoms so I am going to return the new one. Rockauto will take it back even if you have installed it, as long as it looks new.
4. Newtis unfortunately doesn't confirm the orientation of the ISCV:
https://www.newtis.info/tisv2/a/en/e...vernor/BljAF97