2002 buick regal ls 3.8#2

I am the owner of a 2002 Buick regal LS and I currently have no heat in my car at all. The thermostat was replaced, same with the heater hoses, the inlet and outlet of the heater core are hot, the blend door actuator is working along with the door itself, and the coolant was flushed and filled...

2002 buick regal ls 3.8 series 2 heading to work one morning doing 65 and the thing just shut off, had to coast to the side, would crank and acted like it wanted to start but wouldnt, had towed to shop, put on a machine, they said bad maf sensor, and fuel pump they said it was putting out...