Ok I got the profec b2, i have an external wg... top port of gate goes to "COM" on valve and "NC" goes to vacuum source, "NO" is open. Randomly you can hear the "NO" port releasing vacuum, even at idle, if i put my finger over the hole i can feel the suction and after i take my finger off the valve closes??

Its pretty weird im not sure if this is normal functionality or not but it keeps makin me think i have a vacuum leak cause i hear it hisssing.... And every time after i plug it and take my finger away it will close like .5seconds after i remove my finger....

??????

 

???????????

 

my profec b2 does the same thing. not really sure why it does that but i dont think its a problem. it still functions properly and what not.

 

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