I need some help with my savage XL. The problem I am having is at full throttle the car cuts in and out as if it was losing signal. The batteries in the truck and in the remote are new and charged. I have tried new crystals. And I also have put a new receiver in the truck. My local rc shop put in a new one for the same problem but it is doing it again. They said it was because I have a fail safe and they are no good. So I took it out and got the same thing. Only other thing I have installed is a battery level gauge.