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      08-14-2013, 08:37 AM   #18
Jhayd11
First Lieutenant
United_States
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Drives: 2009 335D
Join Date: Jun 2012
Location: United States

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there isn't much consistency in our theories.

So, I wanted to post something to share my observations with everyone's claims to having the best way to avoid Carbon Build Up (CBU).

1.) Drive the hell out of it: While when maxed out, the EGR seems to be avoided. However, this only stops the issue when driving it hard. Even on race tracks, cars idle and have to run light at some point. So in theory, hard driving will prolong the issue but not resolve it or fix it.

2.) JBD: By using the JBD, you introduce more fuel. From my understanding, that is all you introduce. There is no control of the air/egr. Not sure how this would help.

3.) Tune: Theoretically, this could help. I have no idea what values are changed, but this could work. I have no support, one way or the other.
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