Engine Code 1: 1992 Accord

1992 Honda Accord, 229,000 miles. Following the manual, engine code 1 points me to O2 sensor. I replaced that about 3 weeks ago when I had a code 43. Code 43 disappeared after replacement. Code 1 chart then directs me to code 43. "Is code. Accompanied by poor driveability? Yes. Go to fuel supply system." I have checked injector resistors, fuel injectors, replaced both the fuel filter and pressure regulator. Car will start and idle ok, but will intermittently show sluggishness. It will momentarily come out of it when I accelerate, then start bogging down again. After going through this, sometimes it will completely disappear. Rest assured it always comes back. I will say that it seems to happen more when the car is cold, or hasn't been driven for a few hours, but on occasion, it will do this well after it's warmed up. The sluggishness isn't particular to any specific speed can be at 30mph or 60. Code also comes back after an ECU reset. Please help. I'm going nuts.