I'm a brand new user and signed up today to ask a PCV valve question and decided to bump this thread instead of start a whole new one about PCV valves. Backstory: I have an 02 GTI 337 1.8T, no modifications except for a basic cold air intake and reflashed ECU, both of which were...
An major design overhaul, with efficiency and weight reduction in mind. The Cylinder head design is all new but AVS is still there for the intake valves. A second intake injector was used to reduce carbon build up on the valves. We had the IHI IS20 turbo and some units used the Garrett...
The DIY spray cans of carbon cleaner do at best a minor job, the trick is delivering the cleaner evenly to all of the valves you'll typically see the cylinders closest to the vacuum line getting the most benefit from these. For best results take off the intake manifold and spray the cle...