When I replaced the hose and didn't put in a new valve I got boost leak just like your leak, full boost at first and when going over 5000 rpm the boost went down to sometimes 0,2-0,3 bar...

And I got the same fuel smell that you described. It all went away when I putted back the valve into the hose.

 

Oh my god, i need to see this valve, because I like to make one and probe it in my car.

Please can you show me one pic and specs?

Thank you

 

Its just a simple one way valve that stops boost from going into the brake cylinder. Try putting in a valve that allows sucking from the brake cylinder but shuts when you try to blow air into the brake cylinder...

The original hose is about 8mm in inner diameter and the valve's outer diameter is 8,5mm or so, so its practicly impossible to get out from the hose without cutting the hose to pieces.

Are your car a left hand drive or right hand drive??

 

Well my friends my car is crazy, totally, I'm going to call one exorcist.

Ok, the first one: My smell leak maybe fixed, I have found my old braking vacuum hose and with it mount in a new hose, my car maybe run better and no fuel smell, you can look this check valve in this pics:



To Engine:



The check valve:







Now I haven't fuel smell, my boost pattern is 10-8-7psi, and now I have another new problem, exhaust leak by the downpipe, near to the exhaust manifold, is crazy, this car won't run well in my life.

 

Great that you got rid of the first two problems, sorry to hear about the new one. I know it can be a bit frustrating sometimes () but when you get everything sorted and get to enjoy the car, it will be worth it...