I have a '90 300E

My car misfires under sudden acceleration. Cold and hot start are fine.
Recently replaced ICV, OVP, air filter, spark plugs. I have a rotor, distributor cap, and coil on the way. I should mention that I think my car runs a little rich since I foolishly played with my CO mixture, I can smell unburned gas from the exhaust and there is grey smoke. Also, I think I can smell gas in the oil. Any ideas would be greatly appreciated. The car has no drivability problems. It just seems to misfire on acceleration. Sounds like it is missing but since I've never heard misfire I cannot tell if that's what it is. The noise comes from the engine bay, not the exhaust. The car gives off grey smoke at low RPM but none at all above 2000RPM. Any ideas yet?

Thanks, Andrei

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