Quote:
Originally Posted by 335xiE90
Sadly that didn't work. I did however purchase upstream/front oxygen sensor. The other upstream is relatively new (10k miles). Here's to hoping that o2 sensor is the culprit.
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I wonder if its the newer one that is causing the issue... wouldn't be the first time new parts aren't as good as the originals... What brands O2s are you purchasing, and from where?
Bosch voltage regulators... im looking at you...
Do you have a log with MHD removed entirely? I think that would be a good baseline for us. Also some LTFT data might be useful. Also of note, the STFT are pretty close in these newer logs.