My '92 400E is running a bit on the rich side, smells like rotten eggs at times, but not all the times and I was wondering if it is possible to manually adjust the mixture as its possible on the KE/CIS injection system (with a 3mm T-wrench). I replaced the oxygen sensor recently and am now looking at other possible problems with the injection system. I need to get the car up to CA emmissions specs. Any suggestions?
Thanks in advance,
F.J.

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F.J.
81 300 SD grey/palomino 168K miles
84 190E 2.3 black/grey 64K miles (wrecked)
85 190E 2.3 maroon/palomino 92K miles
88 300E desert red/palomino 204k miles
(made to look like a '94-95)
92 400E desert taupe/creme beige 120K miles
(converted to 94-95 E420 looks)