Put a brand new regulator in. A Bosch unit. After doing so my voltage at battery is reading 14.15 v constant. Before I was hovering just over 13.

Oddly the engine was running rich. I had just adjusted lambda a week prior. Now I had to do it again and I had to very much lean it out.

Coincidence or expected behavior?

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

Lambda reading takes into account voltage, so if your new regulator is making more contact and putting out more juice....that would def. change the mixture.

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http://i193.photobucket.com/albums/z...-RESIZED-1.jpg
1991 300E - 212K and rising fast...