p2177 and p2187 and p0300(only on WOT)

The video sounds completely normal

 

I can hear a faint grinding noise in that clip on top of the normal DI noise, I don't think that is an electrical/ spark plug issue though. Maybe the noise is coming from the serpentine belt or PS pump.

If it is a pulley the noise will get worse, you will find out one way or another.

Side note: probably should not do WOT pulls with mismatched spark plugs, seems like a recipe for knock.

 

I just did a smoke test on my EGR to figure out whether the gasket would need to be replaced, or whether the EGR needs to be cleaned/replaced. I did some research on the EGR to see where it was actually leaking, and I came across a post that said the MAF sensor needed replacement as it was causing this type of leak. Before I go down a spiral of whats wrong here, would anyone happen to know? The leak is the the middle between where the EGR plug is, and the bottom of the EGR. I want to guess its, what I show in this picture here.