Posted on 14 July 2015
Carbon build-up on FSI , TFSI engines are notorious issues on Volkswagen Audi models. The problem related to direct injection carbon build up is a fairly new issue. It’s a new issue because direct injection engines have been becoming much more popular and widely used across car manufacturers. One of the leading reasons why soot or carbon build up on the valves is caused by the PCV system. Blow-by gases contains fuel vapors and oil vapor that will collect on the intake valve during the combustion process. Engines can exhibits symptoms such as misfiring on cold starts, lack of power or check engine light. We recommend having the motor oil changed regularly and having the intake valve cleaned every 35,000 miles to restore engine performance and fuel economy