Ok , i have just installed a nosram rs .18 evo in to my hpi mt2 everything is installed correctly. and i am using the stock mt2 servo and linkage

the carb is constantly just over halfway open and when started revs constantly none of the screws make much of a differnce, when the accelerator is pulled it opens fully and then goes back to halfway, but when the brake is pulled it closes a slight bit then rests on fully opened

I am completly puzzled any help would be graet.