Another problem with fuel!

I just replaced my fuel pump with a walbro 255lb. It ran fine and now the car is not responding like it should when i give it gas! Also the fuel gauge reads 31 psi line on and it was set at 43psi. Even when i try adjusting it it doesnt go past the 31 but will go down! Can this be a bad fuel filter?
Check the fuel filter and borrow another fuel pressure gauge and reset the pressure to 43 psi line off. Post your results. Brad
it wasnt the fuel filter changed it and had the same problem, come to find out a bad fuel pump! Shipping it back to racetronix!