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  #31  
Old 11-30-2018, 07:34 AM
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IVM went in before last winter and still had the issues after that. I did take it apart and it had some hints of water/moisture, but nothing that I would say culprit. Nothing was burnt/corroded.

So far, we're just getting hints of sub-freezing temps. I find it does show itself after sitting overnight and the engine gets really cold. If a short stint between starts, it seems to not stumble. I was going to toss on a block heater to see if that helped, but I shelved that project.
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  #32  
Old 12-01-2018, 03:46 PM
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IVM came, saw no noticeable improvement unfortunately.

The IVM that I pulled out had exposed fuses compared to the new one has covered so I'll just keep new one installed.

Will report back tomorrow morning again.

Some pictures:




Also saw no corrosions inside my old IVM.


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  #33  
Old 12-02-2018, 02:18 PM
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WAG here... could dirty/faulty vanos solenoids be at play?
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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  #34  
Old 12-02-2018, 03:18 PM
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Cleaned up the vanos when I was doing the vss as I did the upper timing chain cover gaskets. Vanos were pretty clean to begin with.

This morning I started up the car and did not get any rough idles but it was pretty warm (47* and raining)

So still have some hope.


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  #35  
Old 12-04-2018, 09:33 AM
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Another update!

Past couple days been on the warmer side upper 40s so didn't experience any those days.

This morning, 37 degrees and did not experience any rough idle or blinking CEL!!!

It just did the high idle for about 30 sec and the rpm settled down and I just drove off.

I start my car with my iPhone stopwatch ready lol.

Will keep monitoring.




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  #36  
Old 12-04-2018, 10:02 AM
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Quote:
Originally Posted by mr_robot View Post
Another update!

Past couple days been on the warmer side upper 40s so didn't experience any those days.

This morning, 37 degrees and did not experience any rough idle or blinking CEL!!!

It just did the high idle for about 30 sec and the rpm settled down and I just drove off.

I start my car with my iPhone stopwatch ready lol.

Will keep monitoring.




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Great! I hope it keeps up.


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  #37  
Old 12-06-2018, 05:39 PM
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Sad to report my issue came back now that it's getting even colder.

Experienced the worst ever this morning. CEL flickering then really rough idle to the point the whole car started shaking and CEL stayed on.

Restarting did nothing and this time I couldn't even drive. It kept misfiring and wouldn't accelerate. Stuff like this makes me believe it's beyond the levers.

Free revving kept misfiring as well. Pulled out my scan tool and had the normal p0300 with others for cyl 2, 4, 6 & 8. Wasn't until I cleared the CEL that it idled normal again. Very strange.

It's just the even numbered cylinders on both banks. Cyl 2,4,6,8 seem to be consistently the ones misfiring so I'm going to try putting the old oe coil plugs back to see if it changes.




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  #38  
Old 12-06-2018, 06:19 PM
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That sucks. I didn't want to burst your bubble, but I've been in the state of hope before with mine too. Like right now. I haven't had the CEL yet, but it also hasn't been that cold. I had a ton of bottom end, gaskets, seals, o-rings, etc. done on mine. But mine is also faster after I wash it too, so I think I'm just buying the days until she throws the CEL again.
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Daily Drivers:
- 2004 X5 4.4, 01/2004 production, 295,000km
- 2008 535i, 210,000km

Track:
- 1996 328i, track/race car, ~300,000km

Winter:
- 2001 Ski-Doo MXZ 600 w/800 engine, exhaust
- 1978 Ski-Doo Olympique 340 (vintage race sled)

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  #39  
Old 12-06-2018, 06:47 PM
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Sorry to hear mr_robot. Maybe a CPS (cam or crank) is going bad and starts reading properly after warming up a bit? Just throwing s*it at the wall here.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
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  #40  
Old 12-06-2018, 07:39 PM
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I initially thought that as a possibility but it would have to happen on all cold starts 6hr or 12hr sitting cold. My issue is only after over 12hrs of sitting cold.


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