I have a traxxas tmaxx and I am having some problems with it. When it first starts up, the thing runs hard and pops wheelies all day long but after it runs for a couple minutes, then it starts spitting and sputtering. When it starts doing that, then shortly after, it will just die and wont start again but if you change glowplugs, it will start right up again but starts spitting and sputtering. I have tried adjusting the carb but doesnt help any. Could it just be that the carb is bad or what else could it be? Let me know guys Thanks