I recently ported my .12tr motor and ported the carb to get a better venturi effect. I took it completely apart when i ported it and cleaned it afterwards, so there is no debri in it. When i drive my car and get it to full throttle, the carb sometimes sticks at full throttle and even braking doesnt help. I know its not the electronics because it only does it when the engine is on and at full throttle. I have slide carb by the way. The only thing I could think of was at full throttle the barrel is pulled about 2-3 millimeters farther than the edge of the opening, and this might be causing eddies of air to form, and since I ported it and the air is rushing by much faster now, there is enough force to keep the carb open. If anyone has any suggestions or has had this problem please let me know.