Thanks guys. Good link too, have not seen that article before. I may have fixed my hot startup issue already. It would stumble and stall, stall for sure under any load such as AC or power steering. New O2 helped but this morning I spent 30 minutes dialing in the duty cycle. At idle it was going for 98%! Now I am at 60%. One any other car I would have blamed the MAF sensor.

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