Hi All,

I have recently acquired my 83 XJ6 US spec (as some already know) and the previous owner had done some tinkering. I found 2 "mystery" vacuum lines that currently are behind the relays on the firewall. I thought that they were the same line that someone couldn't remove and another line put in its place. However, I started the car and I felt a vacuum from both. I put a screw in each, and the idle speed dropped. So these have to go to something. I'm guessing they go somewhere in the cabin maybe? They are tiny lines. Smaller than washer fluid lines. Anyone have any ideas what they could run to? Thanks!!

 

Rgds
David

 

There's a vacuum hose the same size that runs from the heater valve and then along the firewall down under the manifold to the distributor. Is this right? It looks like it should go to the cabin and another line comes out that goes to the distributor....

 

Rgds
David

 

I'm thinking that the PO cut the two lines I found, and thought that they were the same line. He then ran a "new" line connecting the heater valve and the distributor.

 

are they the plastic tubing ? black, blue ? then they are for the vent flaps.

 

They are both black. Very tiny.

 

Thanks everyone for your help on this!! Especially the diagrams provided! I am still tracking stuff down on my car, but you guys have been really helpful. Hopefully, I will have some good news to report back soon!