I have U-CAN-DO with 91 4 Stroke on it I had plane on stand breaking in engine. I started to do a range check didn't get 10 feet away and surfaces started jumping around throttle even changed. I tried it again it didn't do it. So I try again and it does it again surfaces just start jumping around. I have the antenna wire in the fuse with about 6" of it coming out the bottom it's in a tube away from the extensions. Any suggestions would be helpful