No, I am not running PCM. I tried to keep it simple. The servo I have on it is a JR that came with my radio system. I don't remember what brand the ignition is, but it could definitely be the problem. I was looking, and noticed that it didnt' even have a ground wire. I will probably try and add one to see if it gets better. I can't believe I overlooked this for so long. The engine is a Peak 65CC that I got in a trade brand new. It runs great, but the ignition is probably pretty cheap.