zasa214

i have an 1986 honda accord lxi (my hot rod). the problem is sometimes when im going usually in 4th or 5th gear it boggs down feels and sounds like its running on 3 cylinders but ive replaced the injectors a couple times (they were used but the problem persisted the same) i also replaced the fuel pressure regulator and it did the same thing i replaced the fuel filter hoping that would be it and i also replaced the sock filter on the fuel pump and im now clueless as to what the problem is someone told me it might be the o2 sensor but it doesnt seem to me like it would do that. please help me out. thanx