why will car not stay cranked? on 1992 Ford Taurus

Car will not stay running. we put brake booster on car drove it home,next day drove it and it knocked off..changed fuel filter,changed rotor button,and dist.cap...trys to crank and does good but when u switch off it want crank back...when it want crank there is fire to plugs and it has gas

Asked by for the 1992 Ford Taurus
This year and model is prone to having fuel pump failures, but I don't want to jump to conclusions here.

Still, I would have the fuel pressure checked as this is a possible issue.