Hi I have a 1996 accord coupe ex, it has the 2.2 with the vtec. Recently its been randomly bogging down at low and half throttle, if I give it the beans it sprints fine though. I suspect upstream o2 sensor as my cousin had similar symptoms on his tacoma and it was the o2. Ive replaced spark plugs, air filter, run some injector cleaner and thats about it. It does not have rear o2 sensor as previous owner removed the cat in favor of aftermarket exhaust. I decided to get a data stream to see if I could look at a few things when it started to bog down. Right around the time it was bogging and not wanting to run I held the throttle there to keep it going long enough for sufficient data. After a minute it stopped bogging but still felt slightly less powerful. I noticed when it was bogging the o2 sensor hit 1.275v and stayed there. Fuel trim was -27 and when it stopped bogging fuel trim stayed at steady 5 and o2 sensor was still stuck, after another minute the o2 sensor started fluctuating again and it ran fine. So what do you guys think? I'm broke as hell but I did order a denso upstream sensor since it was only $30 and was wondering if it could be anything else i havent thought of.


Attached the data stream everything started at around 300s or so

Edit: For clarification the sensor has not gotten here yet or been installed so im just making sure im on the right track

 

-27 on you fuel trim is very low it should be around -3 to +3 or close to and you o2 sensors should be around .4 volts maybe .7 when cold the front o2 sensor is for monitoring efficiency and the second is what is read to adjust the fuel trim to make your car run as best it can. I think your -27 fuel trim is directly related to the second sensor missing.
i would install a cheap race cat to install the other sensor. I do not know if adding a bung to the pipe will do it but it might
also check the tps voltage .5 volts closed throttle and 4.5 WOP. Bad tps sensor will make it run erratically