I have a 2001.5 1.8t with a forge 007 dvv. I also have a godspeed fmic. When the dvv opens to reciculate the air to the piping instead of the steady shhhh i usually get, the air flutters and starts to sound like an hks ssq. It just resently started ive had both the dvv and the fmic on for over a year, could the dvv be going bad?spring worn?needs to be cleaned maybe? any help would be appreciated. thanks.

 

First, what is the second V for? Its diverter valve (dv).

If you are talking about with low boost (5-8psi), it is normal. You should be running either a green spring with 2 shims or just the yellow spring. The green with 2 shims seems to work best with most.

 

Sorry cincytt i got key happy ,long day at work. it has a green spring and two shims but it also does it on 10-15psi, im gonna clean it tommorow anyway when i clean my car and check all the lines and couplings going into it too as well to make sure nothing came loose.

 

You can grease up the pistonand swap in the yellow spring and see how it works for you then.

 

ill try that too tomorow thanks again.