96 Land Rover Discovery Turns Off!

Hello,

I have a 96 Landrover Discovery, with 67k miles. What’s occuring is when I drive my vehicle and come to a stop it idles really low and turns off. I have changed the fuel filter, and adjusted the idle screw, and I have to put it really high so it will not turn off on me. Although, I think the vehicle has adjusted itself again and is turning off again. Does anyone have an idea what it could possibly be? I would appreciate all the help I could get before I have to resort to the dealership, and ev eryone knows they want your first born! Poor student in time of need.

Thank you!

Genesis