Originally Posted by wdba123190

Hi all,
My buddy's 1983 380SEL (w126, 124k miles) is a bit smokey on start-up. After warming up a bit (I'd say right about the time it gets into closed-loop...if I can remember my lamda tutorial ) smoke goes away entirely, not a whisp. Runs just fine cold, idle doesn't stumble and starts w/o hesitation. Uses no oil, no oil in water/compression in cooling system.
Does this sound like an O2 sensor problem? Possibly a smog pump issue? Do they function together or off different temp sensors?
I remember having his dash apart not too long ago and there not being a bulb in the O2 sensor dummy light hole. O2 sensor looks quite new, though.
Any help?
Searching for O2 sensor help sucks, as the searcg requires 3 character words ...
Thanks!
-M-