Why won't my toilet flush?

For the last five years I have had a model pf2 in one of my toilets. It works when it wants to but won't always fill the pressure tank and the water will keep running. Make a long story short, I purchased a complete flush valve system and installed according to directions. After filling the tank to proper level I flushed but the water would not flush out of the bowl. It would run out of the tank but not enough to empty the bowl. I tried to use a plumbers helper thinking it may be air locked, but still nothing. What could be the problem?

This is a pressure assist toilet and you converted it to gravity flush? I doubt it will ever work. time for a new toilet.

The thing with pressure assisted toilets is they do not have to be well designed.
The pressure assist system is a lot like putting a super charger on a Yugo automobile...
It covers a multitude of engineering sins.

Have a look at this link https://terrylove.com/forums/showthread.php?19458-PF-2-repair-parts-for-Eljer-Aqua-Saver