Well you can rule out faulty wiring....
Guess next steps would be to check the housing to make sure vacuum and intake is good.
Most people who witness bogging say it's heat soak. I am not sure of this myself. I have K&N Typhoons and never had an issue with heat soak while others swear their intake air was really high with short pipes. I check my heat shields after a good run (3 hours on highway) and they are nice and cool while my engine bay is soaked.
Seems there are a thousand different causes/effects. Hope you figure it out
