Alright, many of you know I just got a '90 E34... as stated in my initial post about it it does have a quirk or two. I haven't been able to find anything related here, nor online in general. So I'm going to start this thread and post my findings/fixes as I get them. Anything anyone else has feel free to chime in.
Cold Start: doesn't like to, starts then dies, starts then dies... if I give her some gas then she'll stay running. I looked on RealOEM for a cold start valve or something and it didn't list anything for my car.
Check Engine/Brake Fluid warning light: when I step on the kick-down button and get up to a high rpm, then let off the pedal these two lights flicker on for a moment then go away. Somewhat disturbing, and very peculiar. Also, I noticed last night (was cold enough to put frost on my windows) that while idling through the yard on my way out this happened as well... it's always a brief illumination then they go away.
That's all I've come across so far. Anything else I find I'll post, as well as my fixes.