Hey guys, had a few other threads going while trying to figure out my problem. I'll try to be quick.. 2012 Civic LX coupe, 151k miles, having acceleration problems (hesitation) and a rough idle. Occasionally feels like a small earthquake then stops.

No codes / no check engine light. Scanned anyway and got nothing. Mode 6 data shows zero misfires anywhere, and spark tests were done on all coils and plugs-- all good (put new plugs in anyway). Downloaded the Torque app and used an OBDII scanner and saw I had a slightly rich fuel trim.. -8.0% STFT and -7.7% LTFT.

I replaced the air filter, cleaned the MAF. Fuel trims got better, now I am seeing -2.3% STFT and -1.0% LTFT. However I still have some rough idle and the same hesitation problems.

O2 sensors passed the emissions/other tests in Torque but when I look at their graphs (volts over time) they don't look right. Can anyone interpret? These are ALL while idling, car warm, 730-780 RPMs.. curious if the O2 sensor(s) could be causing my issues.







Thanks guys (and gals).

P.S. I only see O2 Bank 1 Sensor 2 in Torque as being "graphable"... I don't see a Sensor 1 graph option, it's blacked out / i.e. not graphable?