Well, like I mentioned, check the motor wires. When mine was giving me problems, it would act real funny like, not arming but still working or it would arm then it would run, then stop, jiggle wires or kick it, then it would run again, I had a seized up bullet connector on the white wire, the part that spins didnt spin and had black spots all over it. I chopped it, soldered it direct, worked better than ever. Then my car eventually started glitching real bad, chopped the other two off, the black one this time was seized, now it works like a champ.Or it could be a funky ESC.