what does the fuel tank pressure does? on 1995 Nissan Altima

car runs but when you hit the gas to speed up it stalls out and shuts off

Asked by for the 1995 Nissan Altima
it is partof the evap ssytem that measures the pressure under which the ldp pump checks its own system for leaks.
it has nothing to do with your issue. you need a shop that can do an engine diag to determine the failure and give you a bid.