EPC light is on,Car turns over but won't start please help

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Just replaced the fuel pump Mechanic thought it was my problem.But now the car turns over but still won't start and now the EPC light is on.My friend who is a mechanic I guess says it doesn't seem to be getting gas to the engine but there is fuel in the lines. He's lost and I don't know what to look at next.Signal mom please help me.