Your car has only one fuel pump. THe thing next to the fuel pump that sort of looks like it is a fuel filter.
Noticing that you recently replaced the fuel pump, I am not sure why it could be failing. Did you run 12 V straight to it? If the pump is running intermittently I think it's bad. You must have spent a lot. You say you got a new fuel distributor. Did you replace it yourself? This is a bit of a mystery.
1985 Mercedes 500SL Euro (Gray market)
1995 BMW 520i Euro (Gray market)
1992 BMW 525it Wagon
1994 Honda Del Sol Si