Yes I did get fuel economy benefits indeed, I have done 4 complete fuel tanks with manual calculations and my mpg's went up 3-6 miles ( and by the way I am running 18" wheels, otherwise I think I could see even higher mpg's for sure)Later when you physically unplugged the v157, you got to the same result as programmatically disabling the flappers (they default open in the default motor position), and you are seeing at least an improvement in fuel economy.
Curious here.... are you seeing a CEL after unplugging the v157? I bet Stage 2 tune ignores all the CEL codes related to it.
Intake flappers - look here, page 12Call me naive as I want to ask the following, we are talking "exhaust" flapper valve right? I have seen a couple of you refer to it as "intake" ??? I went to page one and pictures are disabled....just making sure I am not making a mistake...is there an intake flapper valve as well???....All this time I been talking about my exhaust flapper valve.
And to TDI Wagen: could it be that at least before Mike Malone was just disabling exhaust flapper on their program as std operating procedure assuming some of us would run straight pipes? there is a reason I was told my stage 2 program would support the delete....