Axial .28, OS Speed, Werks, Nova, traxxsucks ETC.. everything has to be checked, it dosen't matter what engine is in it.

Tank, tank lid gasket, tank clunk, is the tank clunk clogged up, is the fuel tube submerged in fuel in the tank, are the fuel filters clogged, is it new fuel line, is the carb leaking, is the carb bolt tight, is the carb cracked, does the engine have any pinch left ETC ETC.... You have to troubleshoot the whole thing.