Funny how your first mention is super similar to the effect he was having with the open EGR ports on the floor. Nice guess AJ! Well done.
I was reading the thread but I could not figure this out in my head. I didn’t notice the OEM intake. Also to be honest, I would not have guessed the floor jets making this kind of ruckus. I e always sealed them up from the get go figuring…. WHY-O-WHY would I want them open in the first place?!?!?!