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how to use fuel cleaners remove carbon build up and clean intake valves on direct injection - YouTube
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Mythbusted: Is a quality tank of fuel all you really need to get rid of engine carbon build-up? - Sgcarmart
![What's the best stuff to use for carbon cleaning intake valves without using a media blaster? I had to replace the water pump on my wife's Tiguan and thought I'd clean out What's the best stuff to use for carbon cleaning intake valves without using a media blaster? I had to replace the water pump on my wife's Tiguan and thought I'd clean out](https://preview.redd.it/gu3sq6nyh2091.jpg?auto=webp&s=751351582f00979a4690146368df3154ee09a17c)