Classic Car won't start Diagnosing no start issue, carbureted car. Spark, fuel, air. Easy tests! 

Great video! Thanks for a nice refresher, as I bought a 1976 Jag and just needed the basics.

I have a 1990 trabant 1.1 with mechanical pump. Yesterday car didnt want to start, even after getting gas. Tried roll starting it in 2nd gear, it started but barely could hold itself up and stalled after a couple seconds. 5min later it started and drove off. Tried starting it in the evening and started aswell, but unfortunately stalled at traffic light. Tried flooring the gas but didnt respond to my push at all. Now sitting here contemplating what it could be. Fuel is squirting out of pump and inside the carborator. Theres about 10L in the tank. Any ideas or tips are appreciated. Thanks for the vid 🙏🏽