I took a video for you all to hear the engine idling. Heat is on, and it's a cold start. The RPMs seem to fluctuate a bit. Not sure if it's a throttle sensor or just the engine warming up. It bounced from 1200 to 1500, down to 1000, and kept between those ranges. Anything of concern? And by the way, I know it's loud, it needs a new muffler.