My torando shuts off motor when I apply the brakes. The throttle wire pulls back on the carburator and closes it. How can I fix this?

Raise the idle speed

I have. To the point where it runs about 10 mph without even touching the throttle. It still will shut off.

try adjusting the servo horn and trims too.

adjust your idle settings. also check your linkages for the throtal servo.

I have. The throttle lever on the carb. pulls back when i apply the brake and shuts off the air flow. If I move the lever on the servo then it will not go.

There should be a seperate needle adjustment on your carb just for the idle. Are you trying to adjust the Idle with the Radio gear?