Ok, I watched some ETCG videos, and found a bad idler pulley. I managed to replace it myself, and now the engine is quiet while idling. However, there is still a noise coming from somewhere that sounds like an old rusty wheel turning. Like a medium pitched groan. It comes and goes, but it’s there most often at 20mph or faster, and gets louder when the speed increases. But it’s not constant. It still comes and goes.
I’m thinking this one might be in the wheels or axels maybe? I listened as a driver and a passenger, and it seems to be coming from the driver’s side. Turning doesn’t seem to affect it. It’s hard to tell for sure, but I think the noise goes away when braking. I’ll search for more info and videos, but again, suggestions are welcome.