I assume hose is part of the vacuum system. My guess it is somewhere under the throttle body, but before i take that out I thought I would ask. It is broken off around the throttle body and terminates going through a firewall

1. do you know where this broke off rom
2. what is it, car seems to drive fine without it
3. What part would i order to replace.
4. If anyone has a diagram of the vacuum hose system, i would love to see it.

As always, thanks in advance.

 

The hose starts at the part-load-breather, (left cam cover) then to the throttle elbow and on to the purge valve.

 

Part # is AJ84880

https://parts.jaguarlandroverclassic...ther-hose.html

This discussion might help:
https://www.jaguarforums.com/forum/x...uestion-60900/

I'm surprised you're not seeing an air leak?