Oxygen sensor replacement......what 2 expect?? (archive)

On humid days ( and perhaps others...but not sure ), by exhaust seems to deliver a white-ish, smelly smoke at cold idle. She's idling very, very smoothly after a recent tune up. However, I am thiking (dangerous) that the computer is telling the motor to run more rich/lean than it needs to when cold.

I've considered replacing the oxygen sensors (64k miles). However, like the guy who says "I need a home computer but I don't know why," I don't know why one would change these (rather pricey) widgets. What would a new oxygen sensor provide in the way of discernable improvements? Would it provide better MPG? more HP? more XYZ?....or simply be a preventative measure to avoid a burned up catalyst or muffler?

Thanks boys

Be safe,
Puff
'93 850ci A
Mauritius Blue
OZ Mito 18"

Follow Ups:

Re: Oxygen sensor replacement......what 2 expect?? Derek P 01:22 8/28/2000 (1)
- PpppFffffaaaauuuuughhhhOOoooourrrrt!!!!!!! Kurt.G 01:56 8/28/2000 (0)
Re: Oxygen sensor replacement......what 2 expect?? Emir 00:22 8/28/2000 (0)
Re: Oxygen sensor replacement......what 2 expect?? Kurt.G 22:24 8/27/2000 (0)

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