Is the Carbon Build Up on Your 2.0T Engine a Design Error from VW and Audi?
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The most common symptom related to excessive carbon build up on your VW or Audi’s intake valves is cold start misfires. This means upon initial startup the vehicle will run rough and the check engine light may even flash, but after sometime the idle will smooth out.
When this happens and you bring your vehicle to VW or Audi specialist they will likely have to check a few things, and might recommend a few repairs to try first before jumping to the conclusion you have carbon build up. Depending on mileage and how recently your spark plugs and ignition coils have been replaced they might start there. Once they have exhausted the options and they determine it must be a carbon issue they will offer you the cost to do so.
The procedure of removing the intake manifold on a 2.0T engine and cleaning the valves would generally cost in the $500 – $700 range. This will vary depending on labor rate and how the valves are cleaned.
Is this a VW and Audi issue only?
No this problem is not exclusive to the VW and Audi brands. This issue is a problem with direct injection engines. Direct injection is used as it is much more efficient than port injection, but it is clearly isn’t free from its own flaws. While many VW and Audi engines seem to have issues around 60k miles or more, we have heard of other manufacturers have carbon issues as low as 30K miles. Take a look at our video below to learn more about carbon build up on direct injection engines.
Why carbon build up happens on direct injection engines
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