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Any CEL codes ?
When was your last spark plug inspection and what brand & size plugs are you running ?
When was the last time you ran some carb/injector cleaner through your fuel system ?
A new fuel pump pumps the gas through the fuel lines but the injectors control your fuel spray.
If I were you I'd start with pulling a few spark plugs and inspecting their condition using a spark plug chart.

It could be something simple or a number of things causing your issue.
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