I am replacing some of the soft lines and starting to get to know the vacuum system. I noticed this solenoid valve is not hooked up. What does it do? I see the solenoid above my brake booster on my vacuum diagram but this one in the picture of passenger side of brake booster is not in diagram.

The line coming from the banjo bolt goes straight to the ALDA. Is this valve suppose to be in series with the line?

In the picture you can see no line is hooked to the side hose on top and at look like the top is like a filter and then on the bottom there is not hose connected either.

I also found the hard white line from the side of the ALDA up to the vacuum transducer had been sealed closed. What would this cause?

Thanks,

Attached Thumbnails

 

__________________
85 300D Turbo