Translation? Intake valves on a GDI engine are exposed to the same gunk-causing contaminants, but there’s no cleaning spray of gasoline over the valves to keep the contaminants from building up.

While port injection is still the most common form of electronic fuel injection, gasoline direct injection is quickly ...

Read more: How To Clean Your ... fuel is sprayed into the intake valve of the engine. Here, the fuel mixes with air before being directed into the combustion chamber. GDI, or Gasoline Direct ...