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 manufacturers ...

The other day I dropped my car off at a European specialist shop, and while I was there, a technician was working in the engine bay of a Mk7 Golf R, cleaning out carbon deposits off the intake valves.

Modern engines are cleaner and more efficient than the ones you grew up with, yet many drivers are discovering a new headache ...

Valve gunk is nasty stuff that comes from the toxic vapor of steam, oil, gasoline and hydrocarbons circulating around the inside of your engine. A normal process of combustion in any gas powerplant, ...

Consumer Reports has no financial relationship with advertisers on this site. The process of walnut blasting, which entails cleaning the intake manifold and valves of a car’s engine with a high ...

A few simple checks and tips can help ensure maximum peace of mind when buying a used GDI-powered car. The Gasoline Direct Injection (GDI) engine is marketed under different names by different ...

Direct injection. Just about every car has it now, and those that don’t probably will in the next few years. It can add power, reduce emissions, and is a big part of why just about everybody is ...

If you flip through the list of features on just about any new car or truck, you’re likely to see the words “direct fuel injection,” or DI. The concept is straightforward enough -- engineers have ...