How to clean intake valves on a TSI engine with Sea Foam Spray [SOLVED]

Thanks for the question David. Until 2007 or so, most production car and truck gas engines had port fuel-injection systems where the fuel injectors are located in the intake runner, so injected fuel is always washing over to help clean the backsides of intake valves. Nowadays, the majority of gasoline auto engines are GDI, or Gasoline Direct Injection. In a GDI engine, the fuel injectors are located inside the combustion chambers, so there is no fuel to wash over and clean the intake valves. A TSI gas engine is a type of GDI engine, so you need a specialized air intake treatment to clean your VW’s intake valves.

The most effective intake valve cleaner we know of is Sea Foam Spray, which is something any Do-It-Yourselfer can use to clean GDI (and TSI) intake valves. Sea Foam Spray is applied directly into the engine’s throttle body/upper intake in order to reach the intake valves. You can find a lot of great info on Sea Foam Spray on our website and YouTube channel (Sea Foam Official).