Should fuel pressure drop when cranking over car?

No, the fuel pressure should generally *not* drop significantly when cranking a car. A slight, momentary dip might be acceptable, but a substantial drop indicates a problem. The fuel pump is designed to maintain pressure during cranking to ensure the engine receives fuel immediately upon startup. A pressure drop suggests issues with the fuel pump, fuel pump relay, fuel pressure regulator, clogged fuel filter, or even a leak in the fuel system.