Hi Mary - Like Bass said we need to know if it's a fuel or ignition problem.
It sounds like your mechanic changed the fuel pump then dicovered the pump wasn't getting power & rewired something. He should have checked for power & ground at the pump
before replacing it. A common problem on these cars is corrosion on the ground bus. If the engine isn't getting fuel & he didn't rewire the ground then this is what to check first. Here's a pic showing the location of the ground bus.
