Any good Land Rover specialist in Virginia?

 

Before you spend $, check your oil level. Also insure that you are running conventional rather than synthetic oil.

With motor off and cold, duct tape your shop vac or home vacume cleaner to your exhaust tailpipe, turn on the vac, and walk around your Disco listening for vacuum sounds that will identify an exhaust leak (most exhaust leaks are instant and cheap easy fixes).

Those are 2 quick/free tests. Might not help. Can't hurt much, though. Sometimes they work.