I've been having a weird problem. In the morning when it's cold, I'll see the RPM swing way up and go back down, I'm also seeing the AFR go to 10.5 and then go back up, and then down. It seems to stop doing this once it warms up. I also got a RPM Noise fault code now. I'm wondering if the coil or some other ignition component is causing RF noise when it's cold, but goes away once everything warms up. I'm really considering getting a different distributor.