My car has been down on power for about a week. Felt like a bad injector.
Then this morning, my car started making this noise randomly:
EDIT: New video, more instance of the noise.
It did this about 5 or 6 times over the last two miles of my journey. I was moving with traffic, rpm between 3000 and 3500 for about 25 miles.
I'm thinking this might be a bad wastegate - either the valve not closing, or not being held closed tightly enough.
The check engine light came on this morning too, plus the cruise light is blinking. When I get home tonight I'll pull the codes and set up my laptop to do some logging.
Solved: The temp probe came loose from the UP, causing the noise.