Within the last 50 mi:

Running ruff - Replaced plugs, wires, cap & rotor.
Runs fine.
Wouldn't start - No fuel, replaced fuel pump. Runs fine.
Wouldn't start - Replaced burnt wire/connector from
fuel pump relay at fusebox. Runs fine.
Burst fuel line - Replaced flexible hose. Runs fine.
Running ruff, stumble home to find fuel purging from the evaporation cannister?? Fuel tank is highly pressurized. No Check Engine light. What's Happening??

 

First time I dropped the tank and replaced my fuel pump....I struggled to get it primed and running for a week. Turned out to be a clogged fuel filter. Forgot to replace that inexpensive in-line component.

 

sounds like either fuel pressure regulator or vented gas cap not breathing.