new to me, 98 M3
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I'm using an "autolink" scanner from a friend, same one on page 2 of this. There's a section for freeze frame data. It shows: DTCFRZF, FUELSYS1, FUELSYS2, LOAD_PCT(%), ECT(degreeF), SHRTFT1(%), LONGFT1(%), SHRTFT2(%), LONGFT2(%), RPM, VSS(mph) - what should I look for in that? Live data seems to show more categories.
I also have the ability to datalog from http://bimmersoftware.com/bmwlogger it shows pretty much same stuff as the live data along with Vanos IN/OUT
Hopefully that Admin gets back to you
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Can you watch a trend/log of ignition timing? Observe it on a working car so you know what it should look like and then observe on the BMW and see if you see odd drops. That's what i have seen when ECU detects knock and pulls timing, but you can usually feel it. My old Maxima would pull timing and feel like it was misfiring without premium gas and I was thought something was wrong until I watched the timing log and realized it was just protecting itself.
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I have a datalog from a couple months ago saved in excel. Can't drive the car the next few days because of the snow. Jinxed us with putting summers on, sorry........
I tried to attach it here, not sure if it will work. In looking at the IGN category it starts out around the 15 mark and hovers there for a while, then goes up to the 30 ranges and hovers around there. I noticed at lines 8781, 9195, 9641, and 11785 it starts to drop down to 1 along with my Lamba sensors zeroing out. Could be something, could be nothing. I'm not really sure.
Again, this log was from a little bit ago. I assume if I do a few more runs it would overall look similar. I'll do that when I can drive again with the weather. If you all can take a peak at this and let me know your thoughts that'd be great.
Attachments:
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I tried exploding it up trending RPM, TPS, and IGN, it is hard to tell but it seems ok. It is most useful to watch while riding in the car, and watching it react to throttle input. Geneally you will see the timing increase as RPM increases, although the more throttle is opened will cause it to drop off. If there is knocking detection you will see small spikes downward on the ignition timing.
I saw this best on a friend's G8 GT that he had tuned but something wasn't right and heavy throttle around 4k would knock, you could hear it, so I used my OBDLink bluetooth device and we could see it pulling timing even slightly before the audible knock was apparent.
For a relatively cheap device I like the OBDLink MX, it's more expensive than cheap ebay bluetooth devices but it works great and the app that is free but only works with their device is quite good. Just connect your phone and choose PIDs to graph. I have not used it with a BMW though.
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i don't really have any noticeable knock or miss that I can hear. Pulls strong under under full throttle. I'll monitor again when I get it back out. Still curious to know more about if the injectors can be tuned or not. My DME says its: MS41.1 if that matters.
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working on the convertible. Subframe out, thanks for the tips @Jdesign . It dropped down just fine with out the bar trick. Guess I got lucky but this job still sucks btw! Had issues getting it to clear the driveshaft. Ended up having to undo the back half of that to get it to clear and drop. Have some nice smashed fingers.
I'm doing all my bushing while it's out. Ordered new Ground Control System Coilovers as well since my JOM's sucked.
Also doing wheel bearings. I forgot to losen my axel nut while it was on the car. Am I going to be screwed trying to get that loosened? Wonder if that will have to wait till things are buttoned back up?
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Have a half inch impact? It should bust those loose pretty easily once you get the locking plate out.
^ This. A decent 1/2" impact (and soaking in a bit of penetrating oil for good measure) should make quick work of those axle nuts
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thanks, yep i'll try my impact! Do e30 trailing arm bushings need to be preloaded? Any tips on doing that off the car?
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Got the nut off no problem with impact wrench. Got to buy a new one
I finally got this putting it back in last night. This job sucked. Part of the bearings froze onto the hub, had to cut and hammer and wedge in a vice to get it off. 2 hours alone messing with that. Bushings were all ok to put back in. Press was a life saver. No idea how anyone could do this without one. Some pictures of the carnage along the way. Saw online people burning their bushings out. That proved to be pointless because you still had to press out the metal sleeve. But I'm sure my neighbors appreciated the fire. Smashed my hand with a hammer and have taken more showers to get grease off in a week than I would normally in a month. Picture doesn't do justice to how dirty I really was! New GC Coilovers arrive today. Will get the rears in and button everything back up. Will get to the fronts in the next week or two. I have to cut 2" of the sleeve and reweld for the type of shocks I got. Gotta find a welder. I'll post more pictures when all done! 
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