Tomorrow I'll stick some new crystals in, screw with it some more...
Well, I changed the crystals this morning, everything seems to be back to normal.
I dunno, maybe they were loose or something...
One thing I did notice, I was pinching my fuel line to check my LSN, and when the pliers touched the motor the servos jumped & chattered.
Is this normal or could it be more of what foxy42 was referring to:
the interference caused by metal on metal while the engine is running, is leaking through the channel.