Carbon Build Up - Page 2 - Audi Forum - Audi Forums for the A4, S4, TT, A3, A6 and more!


Q5 - Q7 For the Q5 and the new Q7

Reply
 
 
 
LinkBack Thread Tools Search this Thread Rate Thread
Old 04-13-2012, 07:04 AM   #11
Audi Forum - Posts like an S4
 
flightmedic's Avatar
 
Join Date: Mar 2010
Location: Airdrie
Posts: 201
flightmedic is on a distinguished road
Default Re: Carbon Build Up

Eddie so was it carbon buildup or more injector issues?
flightmedic is offline   Reply With Quote
Old 04-13-2012, 07:28 AM   #12
Audi Forum - Posts like an A1
 
Join Date: Sep 2009
Location: Markham
Posts: 48
Eddie13h is on a distinguished road
Default Re: Carbon Build Up

when it had 15000 km, it was injectors issue, now at 56000, it is carbon build up issues. also flightmatic, did you find the fuel injector cleaner help your carbon build up issue. also can you tell me the cost at dealer. thanks.
Eddie13h is offline   Reply With Quote
Old 04-18-2012, 09:18 AM   #13
Audi Forum - Posts like an S4
 
flightmedic's Avatar
 
Join Date: Mar 2010
Location: Airdrie
Posts: 201
flightmedic is on a distinguished road
Default Re: Carbon Build Up

Dealership didn't say anything about carbon buildup but at 54000 kms looks like the injectors went again. They replaced all 6 for the second time. The service advisor at Royal Oak now says this is a known issue for Audi and they are hoping for a more permanent fix. It's the Old Audi/VW coil issue all over again.
flightmedic is offline   Reply With Quote
Old 04-19-2012, 03:40 PM   #14
Audi Forum - Posts like an A1
 
Join Date: Apr 2012
Location: Earth
Posts: 9
JohnEnglish is on a distinguished road
Default Re: Carbon Build Up

The carbon build up is due to the direct injection system. With "regular" injectors, the fuel in injected upstream of the valve and is therefore able to "wash" the valves of any unburnt residue. In a direct injection system the fuel is injected directly into the cylinder so the valves do not get "washed".

Lexus has solved this problem by adding a second set of injectors upstream of the intake valves that'll allow them to be "washed" with fuel. It also has the added benefit of increasing efficiency at low RPM as traditional fuel injection is more efficient at lower RPMS and DI more efficient at higher RPMs.

Ford has solved the issue by adding additional filters to the PVC line to make sure that any unburnt hydrocarbon solids are filtered out before going back into the intake.
JohnEnglish is offline   Reply With Quote
Old 04-19-2012, 03:50 PM   #15
Audi Forum - Posts like an A1
 
Join Date: Sep 2009
Location: Markham
Posts: 48
Eddie13h is on a distinguished road
Default Re: Carbon Build Up

So John, is there anything I can do either to delay the carbon build up or even to eliminate the build up? ie. would fuel cleaner or fuel injector cleaner help at all.
Eddie13h is offline   Reply With Quote
Old 04-19-2012, 11:40 PM   #16
Audi Forum - Posts like an A1
 
Join Date: Apr 2012
Location: Earth
Posts: 9
JohnEnglish is on a distinguished road
Default Re: Carbon Build Up

No becuase the issue is not with the fuel but rather the buildup of deposits from the combustion cycle. Some people have found that adding an oil catch can has reduced the amount of carbon build up as it's trapping oil and other unburnt particles before they can re-enter the intake via the PCV system.
JohnEnglish is offline   Reply With Quote
Old 04-20-2012, 06:47 AM   #17
Audi Forum - Posts like an A1
 
Join Date: Sep 2009
Location: Markham
Posts: 48
Eddie13h is on a distinguished road
Default Re: Carbon Build Up

Thanks John for your valuable comment.
Eddie13h is offline   Reply With Quote
Old 04-20-2012, 08:03 AM   #18
Audi Forum - Posts like an A3
 
Join Date: Jan 2011
Location: Toronto, ON
Posts: 93
hojimoe is on a distinguished road
Default Re: Carbon Build Up

drive it like you stole it from time to time!


I was sure my car had carbon problems (3.2L) but I had no symptoms, but got the car scoped last month, and it was spotless

I use ultra 94 from petro, or shell v-power exclusively - never esso - I had a bmw stall over and over again after getting esso premium a few years ago, and never went back
hojimoe is offline   Reply With Quote
Old 04-20-2012, 08:29 AM   #19
Audi Forum - Posts like an A1
 
Join Date: Sep 2009
Location: Markham
Posts: 48
Eddie13h is on a distinguished road
Default Re: Carbon Build Up

Thanks. I guess that was my problem - not driving it hard enough. I always tried to keep it under 3000 RPM.
I did exclusively use Shall V-power though.
Eddie13h is offline   Reply With Quote
Old 04-29-2012, 05:29 PM   #20
Audi Forum - Posts like an A1
 
Join Date: Jul 2011
Location: Ontario
Posts: 27
Ridgeback is on a distinguished road
Default Re: Carbon Build Up

I'm using Petro Canada Ultra 94, so far no issues after one year. Also no excessive oil consumption with mostly Hwy driving. My Audi is the 2 liter ,2011 and used mainly for Hwy trips or pleasure driving.
Ridgeback is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
S4-B8 Secondary Air System Carbon Build Up 2010S4T9T9 Eastern Canada discussion 7 01-21-2013 12:18 PM
Carbonio Carbon Intake vs AWE Tuning C|C|B Carbon Fiber Intake ChuckA3 2nd gen. A3 - (Typ 8P/8PA, 2003–present) 11 05-24-2012 10:25 PM
Carbon Build-up on RS4/R8 Marcus Audi S/RS Models 4 04-09-2010 02:55 PM
Audi will build new entry level A1 model Black_RS4 Other Audi Models 0 02-19-2007 11:32 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 10:48 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.