little fuel problem

[j0natell0]

alright, so the deal is a fuel problem i believe. Sometimes when driving steadily with my foot on the gas it will lose power like im not stepping on the gas, and u can obviously see the speedometer go down. i take my foot off the gas and press it again and the car jerks like it just got backs its fuel?? Sometimes when it happens i mush the pedal and it will go but then it will still come back and occur. It only happens SOMEtimes. But lately kind of alot. I want to fix this problem before it gets worse. Any suggestions?

Btw its a jdm b20 swap.