I have a t-maxx 2.5 it was the first one my hobby shop got when they first came out well I brought it home it wouldn't run I had to get a new plastic black starter and battery. then when I got it back I got it to run went through the breakin runs got all that done then it just started fouling glow plugs like no other and then the engine froze a little bit but it broke free and since then I can get it to run barely but I can't tune it at all I've even had a friend of mine try to tune it and hes had tons of nitro cars before and he can't even figure it out I just need help I don't know what to do should I get a new motor through traxxas or take it to a hobby shop.