my car will start for a few seconds then and I was told to change fuel pump I did still doing the same thing could use some help

Who told you to change the fuel pump? First I'd check to see if I had fuel pumping to the injectors. If not, do you have a blocked fuel line? Fuel filter allowing fuel to flow? Is there crud in the tank that is blocking the flow. Is there spark to the plugs on a constant basis? For the engine to run, you need fuel, spark at the plugs, and air to get Ox. The last thing I'd check is if there is a potato in the tail pipe. Go slow and make sure the item being replaced is indeed NOT working properly. Don't throw money at it, analyze it.