Black smoke staining bumper

[Batwingz]

I do understand the issue. My point that you did not get is that if Hyundai is positioning their product against the competition, no matter what design engine they have chosen, it should not go out the door with the defect of staining the car with black soot like a 1970's corvair!

I am very disappointed. This is a beautiful car. Now I have to wipe it's nose every time I drive it? Or as the other person suggested, start removing exhaust components to make it go away?

Searching on GDI in wikipedia, I find many manufacturers using the technology. Why don't they have the same issues?

 

[Bill K]

I have posted how to fix this problem. All you have to do is cut out the exhaust salancer in the middle of the car. That's what holds all the carbon. I did this to my 5.0 rspec and never had a problem. The factory settings on the car to run rich. You will also get a better tone out of the exhaust.

Chris, what will Hyundai say about this if you need any warranty work???
Will they say that by removing this item, you forced the engine to run too lean??

 

[Soffmore]

Has Hyndai made any changes in the Gen2 3.8 AWD to address the exhaust issue. The lower portion of the bumper is a dark gray near the tail exhaust on the 2015. Does this issue also the effect performance of the engine as time goes on.

 

[scottdk]

Searching on GDI in wikipedia, I find many manufacturers using the technology. Why don't they have the same issues?

In my original reply to you I mentioned that other vehicles with GDI have had the same issue. My coworkers Audi RS4 has the issue, but worse. He opens up the engine and walnut blasts the hell out of it to clean off the carbon and to get his power back. That's a pain in the rear and not cheap if you're paying for it to be done every 10,000 miles to get about 40 hp back. This is one example of the many examples I'm familiar with.

Here is a lot of great info on some issues with GDI engines:

http://www.edmunds.com/autoobserver-archive/2011/06/direct-injection-fouls-some-early-adopters.html

A Google search for “direct injection carbon build up” reveals a flood of owner complaints about the issue across vehicle brands and models, including particularly active threads for the VW GTI, the Lexus IS 250, and a variety of Audi models in addition to the RS 4.

 

[GRIFF]

I have not yet heard of anyone on this forum with a Hyundai GDI engine that has noticed any performance issues or has found it necessary to have any type of carbon deposits cleaned from the intake valves.

Here's hoping the engine is designed to minimize this potential problem in Hyundai engines, particularly the Tau 5.0.

Griff

 

[PMCErnie]

I do understand the issue. My point that you did not get is that if Hyundai is positioning their product against the competition, no matter what design engine they have chosen, it should not go out the door with the defect of staining the car with black soot like a 1970's corvair!

I am very disappointed. This is a beautiful car. Now I have to wipe it's nose every time I drive it? Or as the other person suggested, start removing exhaust components to make it go away?

Searching on GDI in wikipedia, I find many manufacturers using the technology. Why don't they have the same issues?

The exhaust pipes exit through the bumper, rather than below. Just a bad design. Don't lose your lunch over it. Wipes right off. Just two posts here and you've talked yourself into a fainting spell.

 

[Ambush]

The exhaust pipes exit through the bumper, rather than below. Just a bad design. Don't lose your lunch over it. Wipes right off. Just two posts here and you've talked yourself into a fainting spell.

I agree with you. May look bad (I have white satin so it is very bad)but it wipes right off...
I think they can still have the exhaust through bumper but have like it another pipe directed out and angled down where you cant really see it...
I seen a Lambo with same stains on the interstate (yeah it was a UR Gallardo that had to be going 100mph...no need to catch it lol)

My remedy for now, prob get 3M clear film to cover around it or just use some carbana cleaner wax

Oh well

 

[T_D_Diggs]

I have the same issue in my R-spec. But as said it can be cleaned. It can be sort of annoying to look at. But am I the only one who actually really enjoys cleaning my car? Its one of my Zen times. I would spend an hour or more a day cleaning my car if I could.

 

[NSXNEXT]

I have the same issue in my R-spec. But as said it can be cleaned. It can be sort of annoying to look at. But am I the only one who actually really enjoys cleaning my car? Its one of my Zen times. I would spend an hour or more a day cleaning my car if I could.

Me too. It's very therapeutic. I coated the exhaust finishers in the bumper with Colonite. When the tips get dirty I use Nevr Dull to shine them up.

 

[videopho]

Seriously, it's not even funny.
Reading through a couple of pages of this thread.
I did not think I was owning the same car?
I've hardly seen any thing like this on my bumper or even at the tip end of the exhaust chrome exits and I do wash and clean my ride regularly.
If one asks for if I've done any thing differently?
No CAT delete, no aftermarket CBE, no CAI besides a drop-in K&N a/f if you even call that a performance mod!
What have I been feding my motor with?
Mobil1 5-20 and either top tier 93 or 93 Ethanol free wherever possible.
And my driving habits?
No big lead foot here but occasionally some spirited driving whenever the the conditions are right.

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[DRS]

I have not yet heard of anyone on this forum with a Hyundai GDI engine that has noticed any performance issues or has found it necessary to have any type of carbon deposits cleaned from the intake valves.

Here's hoping the engine is designed to minimize this potential problem in Hyundai engines, particularly the Tau 5.0.

Griff

Well... There IS forum post where a smart Genny owner (first gen), who knew first hand how to walnut clean BMW GDI, pulled the intake off his TAU.. The pictures showed the valves a mess. After under 20k miles. He showed exactly how to do it. Too lazy right not to use the bad search feature for it on the iPhone. It is there someplace..

I also have posted what so far has been a remedy for my pulling the intake put and do the walnut clean. I used a I-V drip system that goes in as the motor fast idles. The before and after shots with their lighted cam scope showed I had some build up, enough for me to notice change in engine mileage and drive ability. Once the system went through, clean valves. I do it every 10k miles. The system also had a fuel system and ring cleaning components.. I notice better mileage (almost 3mpg on highway), smooth as silk.. BG makes a system too that many with German sputtering turbo 335s and V8s seem to like.

Also tech said he always insets the drip most system in the front of the manifold. Goes with few of air. Where using the brake vacuum line goes against the airflow and do not have good airflow to mist the drip system. In front, the TAU has intact access with a T fitting in a vacuum line.

 

[T_D_Diggs]

Yes BG 44k. It is what Hyundai Canada recommends And stocks at the stealership. They have a fuel additive and a throttle body cleaner they recommend every second oil change or so.

 

[DRS]

Yes BG 44k. It is what Hyundai Canada recommends And stocks at the stealership. They have a fuel additive and a throttle body cleaner they recommend every second oil change or so.

Thanks. Did not know the model of the BG system.

 

[T_D_Diggs]

Thanks. Did not know the model of the BG system.

No problemo. Worked decent for me.

 

[sluggo]

Yes BG 44k. It is what Hyundai Canada recommends And stocks at the stealership. They have a fuel additive and a throttle body cleaner they recommend every second oil change or so.

I'd love to know how a fuel additive cleans off the back of the intake valves in an engine design where the back of the intake valves never see any fuel.

 

[DRS]

I'd love to know how a fuel additive cleans off the back of the intake valves in an engine design where the back of the intake valves never see any fuel.

You did not read what he said. He said intake (throttle body is the wording he used) cleaner. As in spray injection system inserted directly into the intake, that hits the intake valves. Like the version I mentioned above. BG is supposed to have that too. No one is talking fuel system inserted cleaner only.

 

[PMCErnie]

Came up behind a Ford Fusion yesterday. Same soot problem where tailpipes exit through the rear bumper. I recall that the early Ford T-birds and Chevy Corvettes had the same problem 60 years ago!

 

[sluggo]

You did not read what he said. He said intake (throttle body is the wording he used) cleaner. As in spray injection system inserted directly into the intake, that hits the intake valves. Like the version I mentioned above. BG is supposed to have that too. No one is talking fuel system inserted cleaner only.

I did read what he said, and yes, someone is talking about a fuel system cleaner. In fact, the link he provided brought up quart cans of fuel system additive.

It's not important, but I just wanted to point out to others who may be coming in late that the fuel system additive is not going to address the soot issue.

 

[DRS]

I did read what he said, and yes, someone is talking about a fuel system cleaner. In fact, the link he provided brought up quart cans of fuel system additive.



It's not important, but I just wanted to point out to others who may be coming in late that the fuel system additive is not going to address the soot issue.

Their web site is confusing. However, those who see detail at the bottom, will see on the page you likely were on, a expanded 44 system that includes a intake insertion for GDI systems. And their national radio ads are specific about GDI issues and a BG solution. They mention a lifetime warranty if used every 15k.. This is advertised as a system that hits and cleans the intake valves on a DI. See below. If I had not listened to the radio ads in nauseam while on biz, the web site would not be clear to me either.

In any case, so far I am sticking with the system I show above. Seems to work well.

 

[Batwingz]

http://crcindustries.com/auto/intake-valve-cleaner.php