What do I need to do to fix my problem listed below

The fuel pump assembly either fits or it doesn't. There is only 1 way it fits. The Ciera has 2 known issues for stalling coming out of park. The most common is the fuel pressure regulator located on the fuel rail on the engine. The other is the mass air flow sensor which measures the amount of air the engine is sucking in.

Engine stall immediately when shifted into gear OR when stopping car?.. Can you force the engine to keep running using gas and brakes at same time??