Mamba Maxx questions

When I we first did the conversion on a Losi 8ight with MM controller and Feigao 8XL, we were using a JR XS3. It did the same thing that you are having trouble with. Up close, everything was fine. Once we put it out on the track, it glitched like crazy. We had the motor on the passenger side of the buggy with the esc right next to it, just in front of the rear support at the back of the buggy. We had the receiver at the front of the buggy on the driver's side. This was as far away from each other that we could place the esc, motor, and receiver. It still glitched. Ultimately, we had to put a Spektrum radio into the buggy. When we did this, all problems disappeared.