Hi! First post.
I have a 2013 Elantra. It’s the car that I’ve learned about cars with. I haven’t done anything too heavy with it yet, but finally got to changing my own brakes, spark plugs, ignition coils and bulbs. Did a transmission flush. Hooray for me.
Recently, after I changed the plugs and coils, I had to take the thing on a 500-mile round-tripper, through Appalachia. To say that the computer wasn’t prepared to handle that so soon after having run rough for a couple of days (I was waiting for parts) would be an understatement, and the transmission, while shifting fine, kept missing its cues to do so. A mess, lots of blue clouds out the back end, got hot a couple of times. Not great, but it pulled through in the end and has been running fine since.
EXCEPT that now the car, which always had a little bit of a non-engine rumble to it, hums loud enough to drown out the radio when I get it past 40 or so.
The dash isn’t showing any lights, the tires are only a year old, the front brakes are the same age, the rear may need some maintenance but also just got a passing grade from the dealer so … yeah, i don’t know what this is about or what. It doesn’t sound like a bad catalytic converter, and it’s otherwise asymptomatic for bearings, so I’m kind of stumped.
Like I said, it drives fine minus what seems to be some lost fuel efficiency after running rough (I keep meaning to reset the computer but haven’t had the time), so this is just a weird one.