O2S1 Bank 1 lean O2S1 Bank 2 rich
#1
O2S1 Bank 1 lean O2S1 Bank 2 rich
Hi everyone. Did a little drive and logged some info. I have a bad exhaust rattle at 2200 so I’m wondering if I have a bad catilytic converter. But I noticed that Bank 1 is a bit lean IMO. And Bank 2 seems a little rich. Wondering if I should order me some cat-deletes since I have exhaust coming tomorrow.
Last edited by TheGuyGuy; 12-05-2017 at 06:39 PM.
#2
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You can always take the catalytic converters off and give them a visual inspection. In my experience they almost always look melted at one end of the honeycomb or the other. In the meantime pull all 6 spark plugs, they will also give you a good idea of how rich/lean the combustion chamber actually is.
Use your scanner and look up Short Term Fuel Trim (STFT) to see how much compensation the ECU is making, as long as the A/F sensors are working properly the ECU will compensate +/- 25% fuel before you get a service engine light, even after the light is on it can still allow for up to +/- 50% fuel trim to keep the ratio within spec.
Use your scanner and look up Short Term Fuel Trim (STFT) to see how much compensation the ECU is making, as long as the A/F sensors are working properly the ECU will compensate +/- 25% fuel before you get a service engine light, even after the light is on it can still allow for up to +/- 50% fuel trim to keep the ratio within spec.
#3
Well, I just bought the Megan down pipes w/ resonators. Also I did do some monitoring of that at the same time but I couldn't get a good pic of all 4. They seemed to be more centered on 0% which is good. the voltages kind of worried me. It did very about -15% - 15% or so. Mostly center around 0%. Can't wait to get these pipes on