so ive been out of the hobby for a few years but i am just getting back into it somewhat. ive got a nitro rustler with an OS .15 CVX which for whatever reason i could never get to run right. thought i did the break in procedure correct but who knows, maybe something went wrong. Just cant get it to stay idling through a hole tank, maybe fuel is old at this point or something.

Anyway maybe just the motor isnt good and i should pick up a new one. I still have my original trx pro .15 which i could trade into traxxas for the 3.3 or i could pick up an OS .18. Which one would be recommended or what do you think could cause my isses of this one not running well. I gotta keep the idle screw WAY open to keep this thing idling decently. and i put the needles all back to factory settings for the time being.

or ill just re-abandon my nitro and go back to the mini-electrics that i used to have fun with before selling them