I have recently bought an audi s3 8l 2001. I bought it with a f*cked engine and turbo so I've spent alot of money on a low milage amk engine and recon turbo. got a good mechanic to fit it all and it runs sweet. But when I picked it up it only boosts to about 5 psi and I think standard they run at 7 I had it remapped at the weekend thinking this would solve it.... it didnt still getting 5psi. Theres no boost leaks on it its been tested. When I bought the car the guy said he had the n75 valve bypassed I think to give it more boost. Can someone please help as my bank is empty naw, dont want to take it somewhere and get charged a fortune. thanks all!