Idle rpm's low, what's the problem?
 

I have a 1996 Land Rover Discovery and the problem I am looking for the answer is this: When the engine warms up the idle rpm drop from just over 500 to 250 and it sounds like it's about to cut out. I have been told that it may be a vacuum seal, so I was hoping others have had this same issue and could shed some light on it for me. Thanks for your time

RE: Idle rpm's low, what's the problem?
 

If it idles normal when cold and then not when hot then I would agree that it is a vacum leak.
Take a spray bottle (like a empty Windex bottle) full of water and when the engine is warm and idleing low spray the bottle all over the engine, if it sputters/stalls then look closly at that area.