In this video, I will demonstrate how to effectively clean intake valve deposits on gasoline direct injection (GDI) engines ...

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.

Add Yahoo as a preferred source to see more of our stories on Google. Consumer Reports has no financial relationship with advertisers on this site. The process of walnut blasting, which entails ...

Carbon deposits quietly choke your engine over time, but removing this stubborn buildup can restore lost power and also ...