I really need help. 1989 Saab 900 Turbo Convertable. This problem was not as bad a couple years ago. T really struggles up a hill, alot of herky****** action, it struggles under a load, sometimes Ill be driving just fine and its like its not getting information or gas then all of a sudden races to catch up with where the throttle should be. Really bad lately. It idles fine a little rough but not consderably, I am not a mechanic but have a Bentley Repair Manual, I do run the tank to empty alot of the times, I cant seem to notice if it does worse on a close to empty or full tan of gas.