Smoke on start up
From personal experience I would like to add another possibility of excessive smoke on start, warm up and idle. My 220 SEb was purchased at a deep discount because the owner thought he had a bad engine due to the excessive smoke and a bad transmission, as it kept needing transmission fluid. What it was, was a bad transmission vacuum modulator diaphram, with a replacement cost of $25. The leaking diaphram was allowing engine intake vacuum to suck transmission fluid out of the transmission and into the intake manifold! Walla! The result? A pool of transmission flluid in the air filter cannister and intake manifold. A huge volume of smoke on start up and high vacuum conditions as the transmission fluid is combined with fuel for combustion. Of course this may not be your situation.
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