I watched the dash from where it goes from V4 to V8, most definitely feel the vibration in V4 with holding light throttle it’ll stay in V4, anything more than that it’ll obviously go to V8 but the vibration stays can definitely feel it “kick” back into V8. What a goose chase
Yep, sounds like the afm system is what you are feeling. Couple options:
range device will plug in to your obd2 port and keep that from occuring but need to be taken out to pass inspections. It’s around $240 on Amazon.
There is a place/guy you can send your pcm to I believe that will turn it off for around $50 if I can find the link I’ll post it up.
Find a local person that can tune it out with HP Tuners or similar. My guy would turn it off for $200 but did a full tune for $600.
I went with the range device to start that worked and then had a custom tune done which included afm turn off.
Glad the metal noise is sorted out. But check that exhaust, is that a pin hole I see?