I have been having a check engine light code 43 on my 1995 Acura Integra LS. It’s not on all the time, but it pops up sometimes when the car reaches operating temperature. When I first saw it come on, many seemed to suggest the O2 sensor, so I replaced it and I never noticed any significant performance issues, but the light still came back on. I will note, I have frequently reset the codes on the ECU by taking out the ECU fuses after every part I’ve replaced. After I realized the O2 sensor didn’t do it, I replaced the fuel filter and no change. I took a 3 hour trip to and from Atlanta and the code didn’t come on at all during either way. The next day when I got home, it came on while I was going to work. One day, I was driving around town, made a stop and then it wouldn’t start back up. My fuel pump went bad, so I replaced the fuel pump and the code still comes on. Up until this point, it does idle a little funny some times. I can feel a slight jerk when it idles, but it accelerates and starts up fine. I would greatly appreciate the feedback. Thanks!
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