I actually never set a failsafe, and I recieved two fgr4s. I'm using a Arrowmax Dash esc, which I calibrated after binding to radio. So I tested my 2ed buggy and doesnt happen to radio. I'm wondering if it could be a sensor wire? Or maybe the reciever gets a bad signal after turning off is why radio sees it as full throttle? I downloaded the standard 85 , I live in Sacramento CA. So not sure if I need to download FCC.