I have a Tartan Twin 77 in a Weeks Special. This engine has been converted from glow fuel to gas. I have seen this engine run great in the past. I bought the plane and the first time I tried to run it, there seemedto be radio interference. The engine would go to full throttle and would not respond to throtle movement from the transmitter, but when the engine was stopped the throttle worked fine. I was told the flying wires might be causing the interference, they were loose, I tightened them, and now I have throttle control, but the engine will only accellorate half way and stagnate. I have re-built the carburator a couple of times. Adjusting the high and low adjustments make no difference. If anyone has any suggestions or information, I would greatlyappreciate it. Thank You

any pics of your set up

hardware being used ie servos, receiver, battery, switches

www.billsroom.com
If he can't fix it no one can...

Why don't you run the engine on the bench so you can separate the plane and your setup from the problem. Getting it running good there then start looking at the plane set up. Make sure you don't have metal to metal on the throttle linkage. Keep the ignition module as far away from the Rx as possible.

The wires work as antennae that transmit glitches.
Wire each wire end to earth, or isolate them properly, so there can be no metal-to-metal intermittent contacts.
Isolate your ignition HT cirquit with an earthed HF shield. (copper mesh), and use a resistor plug.