I made an adapter for my 1.8 Liter Gas 2014 Passat from two pieces of hose. I removed the MAP sensor from the intake manifold and replaced it with the adapter. The MAP sensor was temporarlly installed in the top of the adapter and the nozzle for the CRC Intake Valve cleaner poked into a hole in the bottom of the adapter. The longest I could squirt the cleaner into the adapter without stalling the engine was about 1 second. So, it took about 10 minutes to complete the procedure. Unfortunately, I have no idea how effective it was in cleaning the intake valves. But, to anyone with the 1.8 liter gas engine, that is how it is done.