Q: I have a 2009 VW with gasoline direct inject and a 2.0-liter turbo engine. It recently needed the intake valves cleaned (a very costly job) after just 54,000 miles. I understand many manufacture… ...

Gasoline direct injection, or GDI, is one of the most crucial bits of technology in the modern internal combustion engine.In engines equipped with GDI, highly pressurized gasoline is sprayed ...

Gasoline direct injection (DI) engines have been lurking in the shadows of gasoline-burning, internal combustion engine development for decades but are now becoming mainstream.

The professional intake cleaning process circulates a mist into the airstream to prevent puddling and diminish the toughest-to-reach engine deposits while producing low smoke and low odor.

This air/fuel mix, which is ideal for combustion, travels through the intake manifold and past the engine's intake valves, then is compressed by the pistons and ignited by sparkplugs.