I have just repaired a couple quite bad leaks on the pcv system. Bad enough that I couldn't even get over 5 psi in the system with my leak tester. Its still not perfect but its a hundred times better. I will be getin rid of the hole system as soon as i can so it will do for now. Iv took it out for a run and the turbo sounds alot louder, at least I think its the turbo. Would this be normal? Only other thing I can think of is that the crappy standard recirc valve isnt workin properly. Boost seems slightly spikey aswell. Any input greatly appreciated. Cheers