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Q: Cleaning the carbon out of the engine/ a possible vacumm leak on 2000 Audi A6 Quattro

Hi! I have been told by a local machanic that I may need to have the carbon removed from my engine. How can I verify this and is there some where I can read about it online? Also what are is the procedure for this problem? Is there an estimate of the amount of time it would take as well? My check engine light is on and when a put on the tester they found a vacuum error. They thought this may be a leak... Where would be a good place to start looking for the leak? Thanks Kate
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Post the diagnostic trouble codes.
There are professional cleaners that available to clean out the combustion chamber from deposits. Most shops are equipped to do it.
Vacuum leaks could be checked by a smoke pump device.

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