lilonespaz
Drag Race Newbie
Also how long have you been driving around like this? you said you had like 7 or 8 codes... did they all pop up at once or have you had a Check engine light for a long time and just now actually looking?
6
Mechanic says I need a new cat
- Thread starter zync
- Start date
zync
Ready to race!
Thank you! Should I wait for codes or go ahead and change the coils/spark plugs? I believe my first mechanic did they one at a time.
zync
Ready to race!
I want to say about a good 500 miles? All that came up on my dash was the cat light - with the scanner it was all at once for about 500 miles. Hasn't been the first time my cat light came on on my dash.
zync
Ready to race!
Jaber
Modero
VW dealer or any shop that specializes in german cars. Dealer will be more $$$$.
Check out this section and see if anyone has suggestions on shops in your area: http://www.golfmk6.com/forums/forumdisplay.php?f=19
zync
Ready to race!
Has anyone read this? https://www.google.com/patents/US6866031?printsec=description&dq=valve+coating+carbon+VW
"An additional approach for reducing the formation of carbon deposits on the intake valves is to increase the intake valve temperature, at least temporarily, since, surprisingly, it was found that any carbon deposits possibly present are removed at temperatures above 380° C. To this end, the intake valve unit, which comprises, among other components, the intake valves and the valve stem guide, is designed with means that hinder heat dissipation in such a way that increased surface temperatures of more than 380° C. develop at least in the area of the neck of the intake valves in at least one predetermined region of the load characteristic diagram of the internal combustion engine. The intake valve temperature is above 380° C. in the shaded region 112 b of the characteristic diagram. At these temperatures, carbon deposits on the intake valves are removed. This region of the characteristic diagram occurs, for example, at speeds over 3,000 rpm, and in that speed range extends essentially to full load. Even if the internal combustion engine is not operated most of the time in the region during normal driving operation of a motor vehicle, nevertheless, carbon deposits that could adversely affect the operation of the internal combustion engine cannot build up, since their removal occurs very quickly. For example, operation of the internal combustion engine in this region for a period of, for example, 20 min., is sufficient to remove even a thick layer of carbon deposits. In other words, a routine expressway trip cleans the intake valves sufficiently."
"An additional approach for reducing the formation of carbon deposits on the intake valves is to increase the intake valve temperature, at least temporarily, since, surprisingly, it was found that any carbon deposits possibly present are removed at temperatures above 380° C. To this end, the intake valve unit, which comprises, among other components, the intake valves and the valve stem guide, is designed with means that hinder heat dissipation in such a way that increased surface temperatures of more than 380° C. develop at least in the area of the neck of the intake valves in at least one predetermined region of the load characteristic diagram of the internal combustion engine. The intake valve temperature is above 380° C. in the shaded region 112 b of the characteristic diagram. At these temperatures, carbon deposits on the intake valves are removed. This region of the characteristic diagram occurs, for example, at speeds over 3,000 rpm, and in that speed range extends essentially to full load. Even if the internal combustion engine is not operated most of the time in the region during normal driving operation of a motor vehicle, nevertheless, carbon deposits that could adversely affect the operation of the internal combustion engine cannot build up, since their removal occurs very quickly. For example, operation of the internal combustion engine in this region for a period of, for example, 20 min., is sufficient to remove even a thick layer of carbon deposits. In other words, a routine expressway trip cleans the intake valves sufficiently."
zync
Ready to race!
Thank you!
snobrdrdan
former GTI owner
You're asking us for help, but clearly still not listening to it
Direct injection is completely different and is gumming up the back of the intake valves.
NO "expressway trip" is going to remove that stuff
Again, you have to remove the manifold and have it scraped or blasted off to remove that crud or you're just wasting your time
Example:
zync
Ready to race!
You're asking us for help, but clearly still not listening to it
Direct injection is completely different and is gumming up the back of the intake valves.
NO "expressway trip" is going to remove that stuff
Again, you have to remove the manifold and have it scraped or blasted off to remove that crud or you're just wasting your time
Example:
Thank you for clarifying. Someone suggested this via Reddit and remembered what was said in this thread. Was just curious is all.
What I will do (please tell me otherwise if need be): wait for cel to appear and paste the codes in here. Or.. should I do the carbon cleaning anyway?
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lilonespaz
Drag Race Newbie
Thank you for clarifying. Someone suggested this via Reddit and remembered what was said in this thread. Was just curious is all.
What I will do (please tell me otherwise if need be): wait for cel to appear and paste the codes in here. Or.. should I do the carbon cleaning anyway?
Sent from my iPhone using Tapatalk
It wont hurt anything besides your wallet to get the Carbon cleaning. Most people report a smoother idle.. and increase in MPG and some even say they feel like the car is more powerful.
You are up there in the mileage so its probably needed. Not saying carbon cleaning will be the end all of your codes since we cant see them but that is a really big factor to a lot of things.
corydd
Go Kart Champion
Doing this regularly can help prevent some carbon buildup, but it's not going to eliminate any carbon buildup that has already formed. Gotta do a blast service.
