Black exhaust

[Superdave]

Why does the Genesis seem to have excessive exhaust smoke and leave black residue around the exhaust pipes versus other luxury performance sedans? Granted my car is white, but I noticed a good bit of noticeable exhaust from every Genesis tested.
Thanks

 

[pmckechnie]

My G2 had the problem when it was new but at 17K+ miles it doesn't do it any more. We took an 8124 mile trip last April. It was doing it before we left with about 5000 miles on it and wasn't doing it after be got back with about 8000 miles. Soooooo, take a nice long trip and you should be good.

 

[Mark_888]

The Hyundai GDI engines generate more black exhaust than previous engines. GDI for Hyundai engines was introduced in 2012, and hopefully they will improve that aspect of the engines.

 

[Superdave]

Thanks for the feedback. Did either of you happen to use any fuel additives or anything else that might have solved the problem? If not, I will just keep driving and occasionally blow it out like we do sometimes. It only has 9,500 miles on it.

 

[td1042k]

Mother's mag and aluminum polish does a great job of removing this residue and shining up the metal surrounds.

 

[Ambush]

Funny you bring up this topic. I am thinking of making a diffuser for the rear to eliminate that SMUG black mark on the back since i have white too! Lots of cars are incorporating a diffuser now. Just wondering why they did not think we would not like one for ours especially since good ole GDI is smokey???

Stay tuned as I will experiment.

 

[nb_mike]

I noticed the problem in both my 2009 and 2013 Genesis. My 2016 does not have that problem at all. I don't know what they done but they seem to have eliminated the problem.

 

[Because Racecar]

This is a common problem with direct injection engines, especially early ones. It's a result of the high pressure and impulse nature of DI, apparently. These are not the only cars that do this, but they are (as mentioned) getting better.

 

[srobak]

I have a white G2 and notice it does not have this problem. I had anticipated it being an issue, because I saw it on the G1s around town - and even posted a picture of someone's car I saw on the road. I have been very happy and relieved that this doesn't seem to be a problem on the G2.

http://genesisowners.com/hyundai-genesis-forum/showthread.php?t=16758&

 

[Superdave]

Hey guys. I solved the problem. I'm not much of one to make modifications to great cars. However, I checked my BMW forum and found a great exhaust guy in Atlanta. He fixed the problem in about 45 minutes!
The problem is that the exhaust pipe is not connected to the flange you see integrated into the bumper. In fact, it is also too short and the black soot goes around the flange and onto the car. He cut the exhaust pipe just as it came out of the muffler. He then created a new longer exhaust pipe that went deeper into the flange and past the inner lip. I drove the car for about 200 miles today at all speeds from 0-125 several times and nothing on my white car!
Perfect!

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[DavidHanLee]

Hey guys. I solved the problem. I'm not much of one to make modifications to great cars. However, I checked my BMW forum and found a great exhaust guy in Atlanta. He fixed the problem in about 45 minutes!
The problem is that the exhaust pipe is not connected to the flange you see integrated into the bumper. In fact, it is also too short and the black soot goes around the flange and onto the car. He cut the exhaust pipe just as it came out of the muffler. He then created a new longer exhaust pipe that went deeper into the flange and past the inner lip. I drove the car for about 200 miles today at all speeds from 0-125 several times and nothing on my white car!
Perfect!

Neat, I thought so as well. Maybe I'll have my local shop of choice do that as well.

 

[videopho]

SD- Would you post a pic or two (of your new exhaust pipe) in close up. Thx

 

[Superdave]

 

[Superdave]

I would have thought you might want to go even further/longer toward the end of the flange, but he didn't think that would look good and he said it just needed to get inside the flange instead of short of it which lead to blowing around the flange instead of through it. I hope these are good enough. It is dark here and tough to get a great shot.

 

[Ragnar]

Back in the day this black smoke was caused by carbon build up,a good romp on the freeway above 70 usually solved the problem,remember when exhaust tips always were curved down ,it was for a reason. Lol keep that black crap off your bumpers.

 

[shagnat]

Back in the day this black smoke was caused by carbon build up,a good romp on the freeway above 70 usually solved the problem,remember when exhaust tips always were curved down ,it was for a reason. Lol keep that black crap off your bumpers.

Lordy, had totally forgotten about the downward curved exhausts... that's going back a few decades!