Roy Jimmy

Sorry to hear you are battling. I think you are pretty sure that it is not radio problems.

I had a similar problem with my Kangeroo. I eventually put some thin silicon tubing around the EGT sensor which ran down the side of the motor and have had 55 trouble free flights since then.

If it was the pump, you should see it at idle as well. As some people have said before, no mounting boards of carbon fibre, try and seperate the RX and ECU batteries. Don't run their wires together. Try moving the controller around in the fuselage. Have you tried another whip antenna?

Good luck

Zane