ORIGINAL: Flyer95
The glitch can be caused by loose and vibrating metall parts. The glow fourstroke engines in it self can not cause radio interference but if you are by accident using a onboard glow driver and the contact is bad or loose it will cause radio noise.
If this is not the case then most probably the glitching servo is bad, try another one.
Thanks for the suggestions. I have no metal to metal parts on the plane that I know of except internal engine parts and servo gears in the rudder servo. No on board glow ( I still haven't figured out why so many people run this on Saitos, they run great without it) The glitch isn't in one particular servo but rather any one or combination of servos seemingly fairly random.??