ok so i ran the first tank pretty good but the car accelrated by itself sometimes and on the second tank it was accelerating by it self and i couldn't stop it barely and it over heated.....what do i have to do to stop this

It sounds to me like your low speed needle is on the lean side.
Refer to your manual or check out teamlosi.com for factory needle adjustments.

oo well i did mess with it a little because with the factory setting it didnt even turn on at all