I had the same problem with mine! Everything is nice and cool but twice this last weekend I lost all power to the car (no throttle, no steering) and then once it was no throttle but still had steering.

All the led's were flashing (saying I lost radio contact but I was 10ft from the car....) after the race ended I left the car on and the radio right next to it and marshalled the next race. Came back and it had rearmed and was ready to go....

Any input would be great! And agreed is there any way to check on a bad cap?