2.0T running rich - Hyundai Forums : Hyundai Forum
Reply
 
LinkBack Thread Tools
#1 Old 11-15-2012, 04:06 PM
Senior Member
 
Join Date: Nov 2011
Location: Milton, Ontario
Sonata 2.0T Limited 2012 Santa Fe 2.0T SE 2013
Posts: 232
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Mrtheplague is an unknown quantity at this point
(Thread Starter)
2.0T running rich

I have a feeling that the engine is running a little to rich and that is the reason for the black soot on the exhaust. This one of the issues that turbo engines have they don't run at a perfect air fuel mix. I am wondering if Hyundai might come out with a new update on the timing to lean things out so help the fuel economy. any thoughts?
Mrtheplague is offline  
Sponsored Links
Advertisement
 
#2 Old 11-15-2012, 06:32 PM
Junior Member
 
Join Date: Nov 2012
Location: Jacksonville, NC
2013 Santa Fe Sport FWD 2.0T
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
SantyNC is an unknown quantity at this point
Makes you wonder

Although this is my first turbo, I've always been taught that black soot means the engine is running too rich. But when you search Google you get back about even results that a turbo always runs way versus something ain't right. So I wonder why I don't see black soot on VW Tiguans or Subaru Foresters. I don't even remember seeing any on the other Hyundai Turbos like the Sonata or Kia Optima. Makes you wonder.
SantyNC is offline  
#3 Old 11-15-2012, 06:56 PM
Senior Member
 
donnie71281's Avatar
 
Join Date: Nov 2012
Location: WV
2013 Santa Fe 2.0t Sport
Posts: 138
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
donnie71281 is an unknown quantity at this point
My Optima Ex-turbo was the same way. It is normal and nothing to worry about. These turbos run rich at start-up to help the cat heat up quicker and achieve the emissions rating.


Sent from my iPhone using AutoGuide.com App

2014 Santa Fe Sport 2.0T
Frost White Pearl/Saddle
Born 10-29-2013
donnie71281 is offline  
#4 Old 11-15-2012, 06:57 PM
Senior Member
 
Join Date: Dec 2011
Location: westminster co
Sante Fe Sport 2T P&T (wife) Elantra (daughter) Saab 9-5 (me)
Posts: 946
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
dtech is an unknown quantity at this point
turbos will by design run a richer mixture under heavier boost conditions - this prevents pre-ignition and protects the engine. Equipment at the dealer can be hooked into the cars electronics to determine whether the fuel/air mix is correct under various conditions.

but just because you are seeing some black soot on the tailpipe doesn't necessarily mean the fuel/air mix is out of spec. There is a learning curve with auto makers and using turbo charging - let's hope Hyundai is far along the curve.
dtech is offline  
#5 Old 11-15-2012, 06:59 PM
Senior Member
 
igotzzoom's Avatar
 
Join Date: Apr 2011
Location: Orange County, CA
2011 Sonata SE 2.0T
Posts: 301
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
igotzzoom
I've just gotten used to wiping my tailpipe tips down every few days. Turbos typically run rich as a safety precaution at WOT to prevent detonation. Also, rather than a conventional EGR system, Hyundai basically performs the same function through exhaust cam phasing, which keeps the exhaust valves open for a little on the downstroke, sucking back in a little exhaust.

My father-in-law-who is a mechanic says he sees a lot of cars come in with very sooty EGR systems that need cleaning out. I'm thinking our sooty tailpipes is just what would otherwise be going into the EGR system.

Besides, I've heard some real horror stories about early VW and Audi direct-injection engines that got major carbon buildup on the intake valves, so if slightly sooty tailpipes is the tradeoff, that's fine with me.
igotzzoom is offline  
#6 Old 11-16-2012, 09:56 AM
Senior Member
 
Join Date: Nov 2011
Location: Milton, Ontario
Sonata 2.0T Limited 2012 Santa Fe 2.0T SE 2013
Posts: 232
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Mrtheplague is an unknown quantity at this point
(Thread Starter)
do you think the fuel economy would be better if they leaned it out a bit?
Mrtheplague is offline  
#7 Old 11-16-2012, 10:41 AM
Senior Member
 
igotzzoom's Avatar
 
Join Date: Apr 2011
Location: Orange County, CA
2011 Sonata SE 2.0T
Posts: 301
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
igotzzoom
Would you rather have a little better FE or a detonated engine? The 2.0T is capable of very good fuel economy if driven prudently. If FE was a bigger concern than power, maybe you should have gotten the base 2.4.

I feel the small sacrifice in economy with the turbo was well worth the 76 hp gain. Note that the 2.0T was not one of the engines called out in the fuel economy mea culpa from Hyundai/Kia.
igotzzoom is offline  
#8 Old 11-16-2012, 10:54 AM
Senior Member
 
Join Date: Aug 2012
Location: San Diego, CA
2013 Santa Fe Sport 2.0T Serrano Red Premium and Technology Packages 2001 Sonata GLS loaded
Posts: 641
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
grandpaswagon is an unknown quantity at this point
Quote:
Originally Posted by igotzzoom View Post
Note that the 2.0T was not one of the engines called out in the fuel economy mea culpa from Hyundai/Kia.
It certainly was on the Santa Fe.
grandpaswagon is offline  
#9 Old 11-16-2012, 10:56 AM
Senior Member
 
igotzzoom's Avatar
 
Join Date: Apr 2011
Location: Orange County, CA
2011 Sonata SE 2.0T
Posts: 301
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
igotzzoom
Quote:
Originally Posted by grandpaswagon View Post
It certainly was on the Santa Fe.
I stand corrected. It wasn't for my model. Having driven the new Santa Fe, I think it's a great model otherwise.
igotzzoom is offline  
#10 Old 11-16-2012, 11:25 AM
Junior Member
 
Join Date: Nov 2012
Location: Jacksonville, NC
2013 Santa Fe Sport FWD 2.0T
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
SantyNC is an unknown quantity at this point
Oh yes, if my choices are the 2.4, dirty engine (EGR) or soot on the tailpipes? Dirty tailpipes it is!

I run around pretty timid most of the time, but when I need to scoot into that opening or pass the slow-poke, I've got it.

Yes Sir, the Santa Fe with Turbo is a great choice, even if I have to wash the pipes 2 times a week.
SantyNC is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hyundai Forums : Hyundai Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome