Car feels choked for brief moments

How old are your plugs/wires/cap/rotor? Does it sound like a misfire? Any codes?
How old are the O2 sensors? Stock MAF? Does this usually happen a low rpm or any rpm range? Is the idle smooth?
Sorry for all the questions but more info would help narrow it down better. Fuel pump is a possibility, but you can confirm that by checking the fuel pressure.