Hello all,

I am looking for help on setting up ,my vacuum lines properly. I have a US 1979 928 that I am completely restoring. I replaced all vacuum line with new ones the exact same way they were hooked up when I bought the car, however, I have no brake boost but when I clamp off one line I do. I don't know if it had it before the tear down as I never drove it. The PO obviously did some radical re-routing of the vacuum system as many were blocked off, air pump in out of system and there seems to be too many "T's" in the system. I am missing a few thing for my year as well such as #'s 7 & 11 on the attached diagram.

I also do not know what item 10 is either? Is that the check valve at the brake booster by chance?

So I am thinking of trying to just by-pass 7&10 and hook it all up as the European spec also attached.

Any thoughts would be greatly appreciated as this is one of my last hurdles to get it running right.

 

https://rennlist.com/forums/928-foru...utor-line.html

I'm not sharp on the earlier vac setup, but see if the legend in the diagram in this thread helpful.

 

Yes, thank you for that as I do have the legends, I just didn't post them. I have an idea I am going to try today and will post if it works out...... fingers crossed.