xmods evo enigma...

[xmodzracer]

My xmods evo is two years old and up to the last three months it has run perfect. Never had a problem. now out of the blue before a winter storm it started what seemed like over heating. i could run it full speed for about 30 seconds then it would stop. the motor would barely be warm and it still had reception cause i could still steer. If i leave it alone for about ten minutes it would run again for about 20 seconds then die. its weird cause i can still back up and steer and it will work if im going slow and cruising around somewhere cold. i keep thinking over heating but nothing looks like its burning and it will still die out if its cold after about a minute. does anybody have any idea what is wrong with this.