> I just went through the same thing on my father's 95 3.9 with almost the
> same exact readings. The O2 sensor was faulty causing it to run lean (hot
> combustion chamber) which makes for high NOx. We also cleaned out the EGR
> for good measure.
Ok, thanks for the info.
Why was the lean-ness causing high HCs? (i'm not arguing, just trying to
learn..)
thanks,
eric
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