Having some running issues with my car at the moment, first boost leak test i did showed no leaks. I tested from the maf right through. Today i thought i would try a test from the turbo outlet hose to the TB. I removed my DV from the tip. I have two DV's a forge and a bailey. With the forge one fitted soon as i pressuried to 5psi air started to leak from the other side of the valve. With the bailey valve fitted it managed to hold 10psi before starting to leak. I guess this isnt normal? Surely it will be unmetered air?