Check mixture. Check O2 using a VOM put the red lead on the connected single lead of the O2 with engine running and black to ground. Should read above .5V and fluctuate while idling. Range is somwhere under 1 V but of course above 0V. Most run around .7V. Also clean your AFM and Idle Control Valve with some nice Carb Cleaner and a rag. Run some fuel injector cleaner. Also check all Vacuum connections and the Rubber Boot between the AFM and the Throttle Body. When cold if that boot is just starting to crack it will suck extra air in and of course then lean the mixture due to the extra air.

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~Jamie
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2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....