Why is the fuel pump staying on?

I put it in the shop.The man said he tested the fuel pressure it was good.I bought a fuel pump brand new he said it didn't work.I took it back and got another new one.Its still having the same problem.

HOW can the fuel pressure be good , if the fuel PUMP isn't working?

I don't know whats wrong with it.Everybody saying its impossible for a new fuel pump not to work.Thanks for your answer.

No it's not impossible for a new fuel pump not to work , that would be called 'defective' and happens. what I don't get is that you state he tested the fuel pressure and it was GOOD......WHY , then would the fuel pump need replacing? IF the fuel pump doesn't work , you would have NO fuel pressure.........That's where you're confusing me.