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Old 01-02-2002, 03:21 PM
Posts: n/a
This has got to be excessively rich mixture. On a 94 E320, it means the computer is not able to adjust the mixture at all. I had the EXACT same problem on my car (85 190E 2.3), and it turned out to be the O2 sensor - get it fixed ASAP, otherwise you'll ruin the cat convertor. with a new sensor, my HC went down from 142 ppm to 22 ppm, CO went down from about 4.5% to 0.13%.
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