This one,s for the Techs hey guys i have a 87 W 124 (300 E)I have changed wires, plugs, cap, rotor, air filter, fuel filter, engine oil, transmission oil. is there any thing i,ve missed because my car is still not performing up to par the idle still seems to be on the scary side, when you kick down you see a puff of black some in the rear view mirror, What in the hell is wrong with my baby. I have spent so much cash on this car, I,ve lowered it with eibach springs, Cross drilled rotors all around, 17 inch Monoblock rims Clear taillights and clear blinkers and park,Not to mention the Renntech rear camber ajustment links and the sound system,all of this and the damm car won,t idle propley. (someone pleaseeeeee help me)

If you are seeing smoke, you may be having a rich condition. This can be caused by a number of things.
One is low fuel pressure, one is a faulty oxygen sensor or any other sensor for that matter.

I'd have lambda checked by a tech and go from there.

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