97 GMC 4X4 5.7 ltr. ok cannot flash read codes then may some could help me do soome trouble shooting?

Question

My fuel pump died. I replaced the pump sending unit was good. Ran great before the old pump died. After installing new pump the truck runs but has some hesitation and jerking kind of feeling. if you feed her a little slow she gains speed but if you try to push her down at all she hesitates and jerks. If you really try to punch it all it does is rev a bit high but just drops out jerks hesitates. I checked made sureall was tight. The only thing i can think of is a possible pressure regulator. Open to all advice Thanks.

Answer 1

Repalce the fuel filter & then if symptoms persist, that was going to be my suggestion, is check the fuel pressure regulator.
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