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.

it can cut out because it is to rich to

junk the 2.5r and put in a fantom fr18. these things scream i have 2 of them and i can't say enough good stuff about them. no over heating no tuning no nothing just fire it up and bash. had them 6 mo's and NO problems. stormerhobbies.com has them for$150. good luck with whatever you do.

it was the cooling head, wasnt sealing or something. so i put the stock cooling head on and it works fine now, thanks though