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  #11  
Old 06-06-2019, 08:34 PM
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Happy to report that my INPA and Tools 32 are working wonderfully now!


Sad to report that dme ram backup did not seem to make a significant difference in my situation. Car restarted after backup fine, idled for about 30 seconds nice and smooth and then lumped up and threw an SES... funny thing, I actually received more data this time - 2A89 DME Exhaust Vanos 2 \ P0024 B Camshaft Position Timing Over-Advanced or System Performance Bank 2 - I have never gotten that much detail before.


EDIT - second unusual thing, it was starting lumpy and then smoothing out, after the backup it now starts smooth and then gets lumpy.



Another strange thing happened, my power folding mirrors both work again... not real sure what happened there.
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  #12  
Old 06-06-2019, 09:39 PM
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Sounds like good progress.

Can the fact that it runs perfectly for 30 seconds rule out a lot of problems? Seems like it would. For any problem you're considering, ask if it could exist and still allow things to run perfectly for 30 seconds. I bet not many problem candidates survive that test.

Could it be that VANOS oil pressure takes 30 seconds to build?

If you try to run again quickly after one run, do things go bad more quickly? If yes, maybe because pressure remains high from the previous run? If no, maybe there is a built-in clock timer that waits 30 seconds before doing the "smart" stuff.
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  #13  
Old 06-06-2019, 09:52 PM
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Quote:
Originally Posted by oldskewel View Post
Sounds like good progress.

Can the fact that it runs perfectly for 30 seconds rule out a lot of problems? Seems like it would. For any problem you're considering, ask if it could exist and still allow things to run perfectly for 30 seconds. I bet not many problem candidates survive that test.

Could it be that VANOS oil pressure takes 30 seconds to build?

If you try to run again quickly after one run, do things go bad more quickly? If yes, maybe because pressure remains high from the previous run? If no, maybe there is a built-in clock timer that waits 30 seconds before doing the "smart" stuff.





That's what I started thinking through, I wondered if it aligned with the transition from high to low idle so I got a little braver and let it keep running as it tripped over its tongue to see if it would transition and it did!


I got 30 seconds +\- smooth idle, followed by 30 +\- seconds of lump, rough almost stalled idle and then went back to smooth and I think would have idled for as long as I let it but would completely fall on its face if I touched the accelerator.



I actually ran it up to temperature and topped off the cooling system from having the coolant hoses loose.


All that said, it definitely means something because something that was physically broken couldn't idle like it did on cold start for 30 seconds.


Not to mention to run like total crap for the following 30 seconds before leveling off into a (for all practical purposes) smooth idle that I swear I could have idled the gas out...
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  #14  
Old 06-06-2019, 09:55 PM
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I am actually starting to wonder if I have something blocking that bank 2 exhaust vanos oil port causing it to not have\lose pressure.


She's scheduled for the shop on Monday, my wife wants to shoot me now for being in the garage so much, she's threatening putting a bed out there for me.
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  #15  
Old 06-06-2019, 10:57 PM
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Quote:
Originally Posted by Purplefade View Post
I am actually starting to wonder if I have something blocking that bank 2 exhaust vanos oil port causing it to not have\lose pressure.


She's scheduled for the shop on Monday, my wife wants to shoot me now for being in the garage so much, she's threatening putting a bed out there for me.
As someone with a 20 year space between kids, trust me... You are better off staying in the garage

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  #16  
Old 06-07-2019, 09:23 AM
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Did you ever verify the timing? I had an M62 with similar issues and come to find out the PO had misaligned the exhaust cam one tooth when doing timing chain guides. You have several threads going so I’m not sure if you stated that.

I’ve never heard of working on the VANOS to fix a mirror issue; I learn something new every day
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  #17  
Old 06-07-2019, 10:08 AM
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Originally Posted by X5M-ISH View Post
Did you ever verify the timing? I had an M62 with similar issues and come to find out the PO had misaligned the exhaust cam one tooth when doing timing chain guides. You have several threads going so Iím not sure if you stated that.

Iíve never heard of working on the VANOS to fix a mirror issue; I learn something new every day


Right! DME Ram Backup to try and fix a Vanos issue and all I get are working mirrors

Ha!

Timing was my first thought but following the valve stem seals I checked the timing, went in for dinner and double checked it a second time before putting the valve covers back on. Itís really strange that it will now start and run fine for 30 seconds +\- before transitioning back to a lumpy idle. Whatís even more strange is that it only idles rough for 30 ish seconds or so before smoothing back out again... but even after it smooths back out I still canít touch the accelerator pedal or it lags and wants to stall.

Itís almost like the car comes online, starts and runs and then as everything else starts up O2 sensors warm up, transitions to valvetronic, etc, etc, it just forgets how to run somewhere in that process.

Iím throwing in the towel for the most part, itís being towed over to my Indy today/tomorrow for a second pair of eyes to look at on Monday.

I will definitely keep everyone posted on what he finds... itís driving me insane!
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  #18  
Old 06-07-2019, 11:31 AM
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I'd wager that all the shop is going to do is recheck timing. As already pointed out your issue is a classic symptom of engine timing being off - great idling but poof as soon as engine is revved. Yes, you did check the timing. The question is that did the timing tool lay completely flat on the cylinder head and did it slide over the camshafts with no hesitation/completely easily?

https://www.newtis.info/tisv2/a/en/e...ontrol/DpNVZpB

Note:
The timing is correctly adjusted when special tool 11 9 461 rests flat on the cylinder head or protrudes by up to 0.5 mm to the exhaust side.
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Last edited by X5only; 06-07-2019 at 02:40 PM.
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  #19  
Old 06-07-2019, 12:11 PM
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Car doesnít have to be at Indy until Monday. Maybe I will keep it this weekend and pull the valve covers. Iím annoyed that I have this much time in to it and canít get it to run. If all I needed to do was pull the VCs and reset the timing Iíd be pissed at myself for not doing it.

I think between the nudging on here and my own internal desire to fix this sucker myself... I have been convinced to pull the VCs and make 100% sure my timing is spot on.

Other obligations tonight, but rest assured my ass is on that tomorrow! With everything else pretty well exhausted... it just make sense.
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  #20  
Old 06-07-2019, 12:23 PM
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At this point you have additional expenses to lose, so checking the timing is a great last ditch effort.

Don’t forget to set up your cot tonight and good luck!
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