Those numbers point to incomplete combustion. I'd suspect the
fuel/air mixture is too rich.
How long has it been since that car has had the spark plugs changed?
Also, is the O2 sensor in the rear exhaust manifold the original?
One other possibility - the catalytic converter may have reached the
end of the road. Any competent place that does smog checks can do a
propane test that will tell you if the converter is tired. If that car
has the original converter and it has more than 125K miles, I'd have
that converter capacity test done and see what the results are. That
way you'll have some kind of idea what you're up against (seeing that
replacing the converter is much more expensive than plugs or the O2
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