Get your Air Cooled VW Vacuum/Breather System up to par by replacing the Vacuum/Breather Hose. Your car relies on vacuum to control key engine components. The older lines tend to crack or get spongy over time.
Even if your hoses look fine, they could be collapsing under vacuum or closing off under pressure.This hose is used in various areas on the VW, it is used for vacuum applications around the engine bay and is also used for breather applications around the fuel tank on some models.
Replace one hose at a time. Pull one line and cut the new hose to the same size then install the new line.