1998 Jeep Laredo

I did replace the crank and cam sensors. Could the fuel pump not deliver enough volume? I have 49 psi at all times. I would like to check the pump for volume because the engine does hesitate to accelerate and the engine use to run strong but in the past 2 years it started to run with not as much power.

Its putting out 49 psi. With no drop. The only thing I didnt try is putting the gauge up to the windshield and drive because my gauge is short. Ill try that next. If not I may bring it to a shop. Sometimes the hardest things for us do it yourselfers may be easy for a shop.