Bluetooth call issues

My Bluetooth is having a weird issue, I can call someone and its completely fine but sometimes when I call someone ill hear them and all they can only hear is my engine they cant hear me at all. I also sometimes get some weird feedback noises when on the phone almost sounds like dialup as well. imp thinking possibly a short somewhere in the wiring causing grounding issues but i would think it would be a consistent thing its just weird how one day it works next day it doesn't its very random... (this happens on any phone ive tried using other phones)