Gasoline direct injected engines or GDI is the new standard for efficiency in the modern fuel injected engine of today’s automobiles. Fuel efficiency is the main attribute of this new design. Simply put the fuel is injected directly into the combustion chamber instead of into the intake manifold behind the intake valve. A high pressure pump gives the engine management system greater control over fuel used. Also the higher pressures give the fuel greater atomization which adds to fuel efficiency. The main drawback however is that by design since the fuel mixture is no longer traveling over the intake valves, carbon build up is turning up in these cars and creating problems. The cure is to have your automotive service professional clean the intake system with a mist and wand style intake cleaning system every 10 -15 thousand miles.