Jeep 1990 manual 6 cyl 4.0 liter not staying running?

Just bought this jeep today from a car lot and I was driving home after work and about 1/3 of the way home about 10 mins (which is a 30 min drive total) it died as I was coming to a stop light. I restarted it kept driving as I came to the next light it wanted to die the moment my foot came off the gas to hit the clutch and break. All the way home I had to rev it up while trying to stop with my left foot when coming to a stop. There is no clattering or abnormal sounds. Also we have replace plugs, plug wires, cap and roter. smells Rich in ruel under the hood So why is it doing this??? UGH

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