Hey

I currently own a evo4, it has full exhaust, intake, evo 7 front mount, custom piping, evo6 ECU and injectors and afm

Since i done the ecu, injectors and afm, and removed exhaust emissions and airpump, the car isn't running right, it drives fine if u nana it round but soon as boost starts to run it misses and backfires, does anyone have any idea on why the car would be doing this now, all boost lines are fine, its not running any more than standard boost.

Any information or help would be great

Cheers