I went to the track today ran two practice and one quail. my problem is after the big double my esc shut off. now the car does seem to hit hard. so my only thing is does a hard hit cause this kinda thing. i have rechecked my joints and they all seem good. Or maybe it the battery hitting something and losing power. i have the esc strapped down with Velcro. after talking to some off the guy they said my joint look better than there. i also solder some of the other guy car they have no problem. Now this did happen with two 4s lipos of the same make so either it a lipo problem or im missing something. if i turn the esc back on it reboot and just get the n light only. im still on the 238 update also. did not change anything in the esc but for the 4s lipos and to turn on the 7.4 volts and fwd only this is a first time for me having this issue. This is with dean connecters and yes they are brand new ones on lipo and esc. they also have plenty of length for chassis flex. i am a little stumped i went from a second place to a last place cause i had to come out. then it rained so no qualifying after that run. esc hit a 130 f with no fan motor was a 101 after 5 or 6 minutes of run time. lipo still had any where from 3.87 to 3.96 on all cell in both 4s packs.