I have had a few problems with my Tamiya Coppermix (Not the car), but the Receiver. I had called Traxxas since I am running a Traxxas stock receiver and replaced the antenna wire with a 24" wire. When sit the radio down and take the car away from it (Traxxas TQ) the car does nothing which is a big plus! But when I sit on my couch and drive the car out into the kitchen and can't see the car it kinda goes crazy. but when I get closer it quits. I was just wondering if this would happen to me outside or if it is just because I am playing in the house and away where I can't see it. Thanks for your time and Help!

try using it outside, you mighty be getting heavy interfearance in your house, if this does not work, change the crystals

hope this helps , rcluke