Has this happened to anyone? I'm drivin my z-car and everythings fine and then suddenly the car slows to a crawl.. I charge the battery and still slow as mollasess just barely moving. I tried different motors, new battery same deal.. Wheels tun freely with no lint or obstructions. Did I fry the PCB somehow? I'm thinkin some wire is touching something it shouldnt or some transistor is blown but i dunno.. any thoughts?