I've been having troubles with my golf gti recently haven't had any luck with solving the issue replaced spark plugs replaced diverted valve to rev g anyway it turns out the owner before me I broke the n75 vavle nibble to actuator so the hose is just flying free ! 5 psi of boost ! Then he tried to glue it and silicone the thing up ! Bad times so I've ordered one up today coming tomorrow I roughly know what it does but does anyone know how it exactly works