Crank no start

I replaced the fuel pump in the assembly yesterday and took it for a test drive. Everything was good. This morning it started up and I drove 4 blocks from my house to a red light then while pushing the gas pedal to go it felt like I was lagging on power compared to the test drive yesterday. I let off the gas and the engine fluttered really quick and turned off. I tried to start up the engine again and I heard the fuel pump working but the engine just wouldn't start. It cranked but no start. Popped open the hood to check out the fuel pressure release valve to see if it were getting enough pressure build up and it didn't spray out as I assumed it would. It slowly poured out like a stream instead of a spray. Am I not getting the proper amount of pressure in my fuel system to turn over the engine? What did I miss? Is there a way to adjust the pressure or adjust the fuel regulator and if so, where would it be? Or is it possibly something else?