Welcome. I have had my '86 325es since april... a grand total of 4 months... but yeah, i've already put bout 6000 miles on it... I did the whole tune up thing.. figured I might as well do it while I was doing the timing belt.. cost about 400 in parts and about 12 hours... (yeah, I'm slow, but she started up first time) Anyways, that timing belt is not that hard, I don't consider myself a gear head or anything, and I did it... however, as soon as I took the belt off... the temp went up about 20 degrees... Last thing I wanted to do was mess it up... anyways, one thing I would definitely do is make sure you have that 32mm wrench or some kind of substitute.. that can definitely bring your project to a screeching halt.... , oh and by all means.. take that hood off!! That makes things a thousand times easier to get to. I haven't done the valve adjustment, but definitely need it... If you search this site, you'll find plenty of helpful tips. Or you can just use a Haynes or better yet, the Bentley Manual. I have both, and the BMW Enthusiast's Companion... The Bentley can definitely stand alone, it has EVERYTHING, but I have all three, and it's nice to have that much literature... I've got that surging/stumbling too.. I'm thinking it's a combination of maybe a couple vacuum leaks, Temp sensor/switch, O2 Sensor, and probably a plugged catalytic converter. I'm working on getting this stuff fixed, and I'll let you know if it works.... I love my car, and drive it like it's supposed to be driven..... LIKE IT'S STOLEN!! Anyways, two heads are better than one, so if you have any problems, I check this forum fairly often. You probably have some knowledge I don't have either, so it can work both ways....
p.s. this forum is great, but you can also sign up for the r3vlimited.com board. I think this forum is a lot more mature, mostly they talk shit on that board (sorry to anyone that offends, if the shoe fits, wear it) There is a fairly large following for e30 BMWs, so information is more than available.
sorry for the novel
Drive on, Bimmerheads.
'86 325es (TURTL3): PJ peetsa hawler
'87 535is (BADWATER): almost done... really.
'86 325e (GRN HLL): DD/show/rocket
'04 x3 3.0i: Wife's Bimmer (manual, woot!) My BMW Blog