For some reason, I moved the low mixture needle valve and don't think I got it back into the right place. It seems that if I have the engine running at idle and the trim in the middle the engine will stop when I trim it all the way down, but the engine seems to bang a little bit and it looks like sometimes the engine starts and then starts again all within milliseconds. I also get engine stops mid-flight.If I change the control rod so that the engine idles faster, I cannot shut the engine down.

Currently, I am just moving the trim up so that it runs smoother. What should I do?