I would start by checking the spark to see if it is strong and blue.
If so, I would use my noid light to see if the injector pulse was nice and regular as it should be. If I did not have a noid light, I would spray some carb cleaner, starting fluid, whatever, into the throttle body to see if the engine sounding like it was trying to run properly as long as the spray lasted...or at least sounded more normal than it was currently acting