I have a T-MAXX 2.5 with a TRX 2.5 R in it. when i accelerate it acts rich because it is so sluggish and when it trys to shift to second gear it cuts out like its lean. Ive set to factory settings and tunned from there several times and it just gets worse and worse. when i tune the high speed needle by 1/16 of a turn it will jump from acting really lean to really rich. i dont have a clue what to do because it feels like ive tried everything. any input would be very helpful. Thanks.