Appreciate the insights here. It was painfully obvious what was the cause.... when I flipped over the intake after unbolting banjo....

Teaching a teenager to wrench got frustrating and I failed to notice a massive gap in the TB to intake manifold. PCV needed done. As it was definitely clogged up ...

I'll grab a better vid after PCV. If it's still happening. It sounds like sputter in vid, but it's fluttering air coming through intake filter. Filter is fresh out of the box as well. Forgot that in the list.

Ordering PCV for sure, but wondering if the flutter is related or tcv or cbv might be the cause there.

It didn't do any of this when originally parked. The ETM and sway bar bushings caused me to set it aside until my next kid driver became of age. I can understand why the hardened gunk would make ...

Trying to get an 06 2.5T that's been sitting, running again. PCV glove test made it a balloon at idle.

New: ETM (the reason it was parked).
Coils and Plugs
Battery

The throttle was unresponsive when parked. ETM fixed that, but now idle is extremely rough and has popping noises from intake ...

ETM, battery, octane booster for old gas, plugs, and coils... Then PCV glove test since none of that improved idle and noises.