Genesis sedan 2015 3.8 V6 AWD RPM drops and shakes when wait for traffic light!

[Seejay]

Gotcha, I'll just grab a nice one at autozone.

Interesting I just filled up here in Ohio and 87 is $2.36/gal while 93 is $2.96/gal. ($300 annual variance based on my driving)

While I agree with the sentiment as far as "what's a few cents extra when you own a car like this", if I applied that thinking across the board I wouldn't have bought my first house at 25 and I wouldn't own this car now one of the many reasons I think this is the best deal out there is bc I thought I could get away with 87oct (compared to the 535, GS, e300, etc)

Yeh, I am budgeted for 2.50 a gallon. If it goes up, I will just run 87 oct and do lots of italian tune ups. My sister in law, who drives an Equus, just runs regular. I told her that she is losing HP running regular and she just gave me her look and said "it's already too damn fast."

 

[Munch520]

Is getting a TB cleaning part of the 22,500 suggested service? I just put some fuel additive in the car, changed the air filter and changed the engine oil and filter. Should I have the TB done too?

If you're having idling issues, yes

 

[Seejay]

Is getting a TB cleaning part of the 22,500 suggested service? I just put some fuel additive in the car, changed the air filter and changed the engine oil and filter. Should I have the TB done too?

Did you do the magnet flap mod we talked about last Sunday?

Here are some pictures:
http://genesisowners.com/hyundai-ge...ir-Filter-Box-Contraption&p=224905#post224905

 

[Munch520]

Did you do the magnet flap mod we talked about last Sunday?

Here are some pictures:
http://genesisowners.com/hyundai-ge...ir-Filter-Box-Contraption&p=224905#post224905

I just did that when I changed the engine air filter. Slight improvement in throttle response.

On another note the RPM issue came back on mine, then (after walking some friends into their house) I come back to my idling car making a ton of noise and doing a little revving or something on its own. Check Engine Light was on, here's the codes

P0638 Throttle Actuator Control Range/Performance Bank 1
P2106 Throttle Actuator Control System - Forced Limited Power
P2110 Throttle Actuator Control System - Forced Limited RPM

Dealer is replacing throttle body tomorrow

 

[lobsenza]

Wanted to update this thread with my results, my TB wasn't changed but it was cleaned and holy crap what a difference. Idle is perfect (500 rpm once up to temp) and gas mileage has improved a few mpg according to the computer.

My question is, why the heck would the TB be gummed up enough to cause idling issues after only 25,000 miles? I don't think my engine air filter's been changed yet, would that have something to do with it?

I clean the throttle body and fuel injectors on all my vehicles about every 12,000 miles. This is even more important with direct injection. If you went 25,000 miles before a problem, you did very well. Hyundai recommends using Techron fuel injector cleaner fairly often (I forget, 3000 or 5000 miles).

 

[Munch520]

Thanks for the input, I'll make a note to do that.

 

[Rhodes]

I just did that when I changed the engine air filter. Slight improvement in throttle response.

On another note the RPM issue came back on mine, then (after walking some friends into their house) I come back to my idling car making a ton of noise and doing a little revving or something on its own. Check Engine Light was on, here's the codes

P0638 Throttle Actuator Control Range/Performance Bank 1
P2106 Throttle Actuator Control System - Forced Limited Power
P2110 Throttle Actuator Control System - Forced Limited RPM

Dealer is replacing throttle body tomorrow

Did you ever get any resolution to this? I have the same issue on my vehicle now...

Thanks,