check all your cords...sometimes a cut in the wire will make you glitch.
make sure you have everything plugged in right.
make sure there are no wires getting crossed with the antenna.
make sure the antenna is fully extended out of the body and through its straw.
re arrange your components or separate them with something so they dont touch... I used to glitch, but I moved the RX and ESC bout 1mm apart and used some foam to spacem out and it fixed it.
replace one component at a time to see if its that, or replace your crystals...they do go bad after time.
ESC's sometimes have an extra wire for digital servos...check that out or cut it off.