I have recently purchased a 95 Disco and noticed a rough idle (not too bad, but you can notice it). I new to Land Rovers so my question is, the vacuum advance has 2 ports, 1 of thje ports has a hose going to the top of the air intake. Where if any does the second go to??? there is no hose attached.

Would appreciate a diagram or just send a little help.

 

good question i have same problem, it doesnt affect it running, it just idles rough. sometimes it doesnt, it depends on mines temp.

 

I would try a vacuum cap and see if it help.

 

Welcome Hzuni !

The second port is not used. The first port is used to advance the timing on your 14 CUX Lucas fuel injection system. Remove the distributor cap and see if the rotor can be moved back and forth. It's common for the distributor shaft to seize and advance the timing causing a rough idle. There are many other possibilities of a rough idle.