It's the Sedan version - been pretty well babied. I know... I know... it's just a fancy Kia.
When first started, it will start normally, but the idle will be rough. Then, around 10 seconds later, it will rev up to around 1700 rpm for about 2 seconds
Then goes down to around 1200rpm. After driving for 2 or 3 minutes, it will idle *smoothly* at 800-900rpm.
What is going on when the car is started, with the rough idle which smooths out? New air filter. Is the car testing the air for air:fuel ratio?
Any codes?
You could try cleaning the MAF sensor.
If it doesn't have one, why does AutoZone and everybody else sell them? Duralast #DL3030 - $62.99. It should be located in the breather tube between the air filter and the throttle body.
If there aren’t any codes, try this cheap method first & clean the throttle body -
Also, when was the last time the car had a tune up? (Spark plugs, etc)
I haven't had the spark plugs checked since I bought it, around 15k miles ago. Haven't done anything, really, except oil changes. I'm scared to death to mess with asking a mechanic to change the transmission fluid, but I think it has to be done?
No tune up. At 65k miles, let's say not a whole lot has been done by me, what are the big items to take care of? I got this from a very old dude, and it was like new. You can tell he never got on it - it was his cruiser. Now it's my cruiser and I'd at least like to make it to 100k! 🙂
All the routine maintenance items should be mentioned in your owner’s manual. Something similar to this - http://cdnedge.vinsolutions.com/DealerImages/Website_4640/Service%20Department/SuperServiceMenus/gen-coupe-2013-2014-3.8-lt-auto.pdf
Yes, I would change the transmission fluid too. https://carkiller.com/scottykilmer/qa/atf/
If you don’t plan to do all the work yourself, it might be a good time to start scouting for an honest independent mechanic in your area.
- Stalling, jerking, or hesitation during acceleration.
- air fuel ratio is too rich.
- air fuel ratio is too lean.
Would you have any idea where this thing could be in a '13 Hyundai Genesis Sedan? Or even a place to look? Also, I found this, while genesis coupe, says there's no MAF in the '13
https://www.gencoupe.com/threads/so-the-13-does-not-use-a-maf.96336/
I'm assuming the MAF is the big metal cuff thing? And not the little sensor the video starts out with? Doesn't look too difficult to take off...