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X3 E83 (2004 - 2010)
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  #1  
Old 11-29-2015, 02:51 AM
abscate abscate is offline
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2006 X3 cold no-start, resolved

Had an interesting experience with the X3, 132000 miles

I moved it two spots in the driveway for Thanksgiving shuffle, and three days later it would not start. The cranking sounded funny, like a jumped timing belt/chain...sort of wheezing and faster than normal.

I had both spark and fuel at the rail, and then realized what had happened. The last cold start had never burned off the cold start fuel, and I had lost compression in the rings.

I pulled the plugs, cranked for 10 seconds, replaced plugs, and the car started and idled tough with white smoke. 15 seconds later it smoothed and I had normal running. Took it out. On highway and all well.

Moral of story...on a high mileage car, don't short run it without a few minutes to run.

I wonder if anyone knows if flooring the pedal on starting opens the throttle body wide and perhaps shuts off fuel in software, kind of like a choke unloaded of old?
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  #2  
Old 11-29-2015, 09:48 AM
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X3-terrestrial X3-terrestrial is offline
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Hmm..Did something got spit out the spark plugs holes while you were cranking? It sounds to my like the engine was hydro locked.
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  #3  
Old 11-29-2015, 10:36 AM
Supercourse Supercourse is offline
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You are on the right track with the cause.

If you Google "car wash syndrome" you will see lots of stories similar to yours - mostly with German cars.

Why German cars? Not sure. It's not exclusively them, so nothing certain as to cause.

Temporary loss of compression as you say is a good explanation - consistent with the faster cranking (and maybe the wheezing sound too) during the failed starts.

But I am not sure it's limited to higher mileage cars.

To explain the German connection, might be more to do with Bosch engine management software and how capable it is in determining the precise air/fuel mixture when there is residual unburnt fuel in the combustion chamber.

So I avoid driveway shuffles whenever possible whatever the age of the car. Domestics and most Japanese cars seem immune but I still try and not to do it if only to avoid extra wear.

When this car wash syndrome does happen, flooring the pedal does seem to be the way out of it, so it must work as you suggest in cutting off fuel.
Even though when chokes disappeared with FI the word was that flooring the pedal when starting no longer had any purpose.
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Old 11-29-2015, 11:03 AM
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TheCritic TheCritic is offline
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THANK YOU THANK YOU THANK YOU!

I had the EXACT same problem, moved the car slightly in thanksgiving shuffle, this morning it turned but would not catch and run. Flooring it while trying to start got it running.

THANK YOU AGAIN.
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  #5  
Old 11-29-2015, 07:53 PM
abscate abscate is offline
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Too funny...but exactly what fora are all about...


In volvo land it's called " lawnmower syndrome" as in you back the car out of the garage to get the mower out, and then have a no start.
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  #6  
Old 11-29-2015, 08:22 PM
bmdubya1198 bmdubya1198 is offline
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And that's why I always run my cars for a minute before and after moving them. The Volvo's manual recommends that anyway for the turbocharger. This seems like a fairly common issue now that I've looked.
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  #7  
Old 11-21-2016, 08:25 AM
abscate abscate is offline
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If your car won't start this Thansgiving.....

Traditional annual bump of this thread for people with many guest cars in their driveway this week!

Happy Holidays everyone!
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  #8  
Old 11-21-2016, 03:06 PM
bmdubya1198 bmdubya1198 is offline
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Quote:
Originally Posted by abscate View Post
Traditional annual bump of this thread for people with many guest cars in their driveway this week!

Happy Holidays everyone!
Good thinking
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