It is time to put some gasoline in your tank! 2 gallons will not cut it! It is also time to replace the gas filter, it is probably full of crud that was floating on top and is now in your filter and injectors.

The fuel pickup is at the bottom of the tank and is not picking up settled crud, but when you are on a hill, there will not be enough gas to cover the fuel pickup and you will draw in air/fumes causing your engine to stall.

The CEL is probably on because of a misfire or 5. Go to an auto parts store after you get at least 1/2 tank at a good gas station, and get the codes read and cleared. Write down the codes, in case there is a real problem.

The black smoke is from an over-rich condition which could be dirty plugs or injectors.

Klaus
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The 164 has a new home, all I am left with are a 95 854T and a 98 V70R :)