Failure to start

What on earth is that thing connected to your PCV valve? Is that a filter attached to it?
That's not how it works. A PCV valve is a valve to suck the fumes out of your engine so to speak. It doesn't let any are out through it without vacuum (think 1 way check valve). You should hook up your PCV valve ASAP. It attaches to the middle front port on the carb. Without it you are causing wear to your engine and it will rapidly cause oil leaks. Right now your engine is building pressure inside while running with very little ventilation.