my friend has a d15b2 dual point fuel injection in his crx and we took out the first butterfly before the throttle body butterfly and it bogged? why would it? isnt it restrictive? we also took out the bronze plate in the upper air box over the TB?

 

that top butterfly is called the tandem vavle. Im sure not, but Im guessing that since you took it out, its playing havoc with the airflow past the injectors.

 

mybe if you reset the ecu i dunno it might work