On the off chance there is a problem with the RX, I'm switching out the RX.

I'll give your idea a try though Terbo. I was thinking that I did try that, but the system wasn't working at the time anyways. dah...

I have two other MDS engines, another .18 and a .40 that this does not happen with. But it does jitter on the AP .09, but the radio continues to work. When I remove the igniter, the jittering stops and all is OK with the world. (BTY...that little AP is a sweet engine).

Again, I think it is the close proximity of the radio RX to the engine that is a main factor. Too much mechanical RF. ???