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      01-24-2013, 04:45 PM   #21
Robspages
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Drives: 2009 Alpine White 335d
Join Date: Jul 2012
Location: Atglen,PA

Posts: 24
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Quote:
Originally Posted by montr View Post
How do I know I have carbon built-up?
For me, parts started to fail all related to air intake and emissions. It started with the mass air sensor, then a thermal sensor, followed by some related codes. After those were clear, the Service Engine Soon light returned. Certain Subaru engines show a similar pattern when the turbos start to die: metal fillings from the turbos start to foul intake parts before thrashing around in your engine. With that in mind, I did some Internet searches (most pointed here and 'fest) and when the SES returned, I asked the tech to check for carbon/oil build-up or metal filings as that many parts dying in succession sounded fishy to me.

Last edited by Robspages; 01-24-2013 at 04:51 PM.
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