Have a new problem with my mk1 Octavia vrs, recently when I'm driving the turbo stops working as you can feel the loss of power, but it still runs ok I had it checked and it said I was loosing vacuum between the turbo and 're circulating valve. I had a new vacuum valve put in but still it keeps happening! Amy ideas would be fantastic thank you guys

Also when the car has been turned off and sat a while it's like it resets itself and turbo works again for a while