First Porsche - Stuck at gas station

[dlewis23]

I just purchased my first Porsche a 2000 Boxster and it runs great but yesterday I got stuck at the gas station after filling it up. The car would not start after I filled it up, it would just crank. If I pushed the pedal while it was cracking it would start, run rough and just die a couple seconds later.

After about 15 minutes max sitting the car started and ran fine.

When I purchased the car it has a CEL with P0446. I have cleared the code and changed the gas cap before I went to the gas station yesterday so the gas cap was not an issue.

I did not get a CEL back on since the problem with starting the car yesterday.

Any idea what my next part to check/replace should be? Looking around I see others talking about the EVAP shut-off valve, EVAP Purge Valve (Which I can not find the part to order) or the Fuel Tank Bleeder Valve.

Any input is appreciated.