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AP Moller
Member Since: 23 Feb 2007
Location: Cape Town
Posts: 246
  
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| New (major) risk/problem? |
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After switching off and removing the key, my D3 TDV6 continued to idle for a for about 30 to 45 seconds. Driven by wife (aka SWAMBO): says she tried to turn off engine but it continued to run even with the key removed ...
The car was parked in the garage after returning home and did not roll forward as it was not in drive.
LR Cape Town thinks it was the battery (now replaced) 
Could it this be "dieseling"?  Not?
If it had been in drive, this could have been an unhappy little glitch.
Anyone out there aware of this problem? (nothing specific on this site thta I can find)
Bulletin(s)? "None of Nature's landscapes are ugly so long as they are wild"
John Muir
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 22nd Apr 2010 1:39 pm |
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Navigator
Member Since: 17 Mar 2010
Location: Stay at Home. One of the lives you save could be your own.
Posts: 5113
  
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"Dieseling" occurs when an engine is able to run because it can draw in a fuel and ignite it by compression. In the days of oil-bath air filters this situation was easily created if the vehicle was tipped to one side at about 45 degrees.
The possible source of the fuel here is interesting. As I understand the common rail design, the injectors need to be opened electrically to allow fuel to pass through from the high pressure rail. If an injector was failing to close entirely there could be a source of fuel until pressure in the rail dropped.
Another possibility is the well known problem of oil entering the vacuum pipe to the servo. If this had occurred, and was able to be sucked back into the engine, it could diesel for a short while. Perhaps someone with more detailed knowledge of the plumbing involved could comment if this one is possible. A vaccine does not stop you catching a virus, or passing it on, or getting ill from it, really ill. It does reduce the likelyhood of you dying when really, really ill. Stay Alive - KEEP AWAY FROM PEOPLE.
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| 22nd Apr 2010 1:59 pm |
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AP Moller
Member Since: 23 Feb 2007
Location: Cape Town
Posts: 246
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Quote:Another possibility is the well known problem of oil entering the vacuum pipe to the servo. If this had occurred, and was able to be sucked back into the engine, it could diesel for a short while. Perhaps someone with more detailed knowledge of the plumbing involved could comment if this one is possible.
Navigator, your idea makes perfecr sense: I have had the vacuum pump recall/ refitting done about 7 months ago and since then there had been a problem with an oil leak (work not done properly, which was fixed, i am told). If the plumbing is faulty ... "None of Nature's landscapes are ugly so long as they are wild"
John Muir
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| 22nd Apr 2010 4:43 pm |
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sarumlight
Member Since: 06 Nov 2008
Location: Off the Plain
Posts: 1592
 
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I thought the vacuum was supplied by a vacuum pump, because a diesel engine doesn't have a throttle to cause a vacuum in the inlet manifold. The issue that the recall is about is that oil gets sucked up the pipe from the vacuum pump into the servo. So I don't think there's a way that oil could get from the brake servo into the inlet manifold?
Don't have my D3 with me or I'd look at where the pipes go!
The time I saw an engine "dieselling" it wasn't idling it was screaming away completely out of control with smoke everywhere. Pretty scary actually 
If the engine was idling smoothly then this sounds like an electronic glitch to me.
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| 22nd Apr 2010 5:30 pm |
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Baben
Member Since: 15 Feb 2006
Location: Kyalami
Posts: 2059
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Faulty injector? Perhaps, but it would take all 6 injectors to keep the engine idling smoothly, wouldn't it?
Engine ECU? possibly.
Has it happened again?
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| 24th Apr 2010 5:42 am |
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Navigator
Member Since: 17 Mar 2010
Location: Stay at Home. One of the lives you save could be your own.
Posts: 5113
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Baben wrote: idling smoothly,
Was it smoothly or lumpily? A vaccine does not stop you catching a virus, or passing it on, or getting ill from it, really ill. It does reduce the likelyhood of you dying when really, really ill. Stay Alive - KEEP AWAY FROM PEOPLE.
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| 25th Apr 2010 3:08 pm |
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B16 KJR
Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005
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Could be the seals on the turbo unit on their way out, allowing the oil to enter the intake side of the turbo and be fed into the engine.
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| 25th Apr 2010 5:16 pm |
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AP Moller
Member Since: 23 Feb 2007
Location: Cape Town
Posts: 246
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Baben/ Navigator: it was idling smoothly . Since the battery was replaced the problem did not re-appear.
Since the new battery installed another recent "glitch" when nav was not available on startup is also gone -- for a second or more it flashed a warning and then showed a blank screen.
B16 KJR, I will have the Tubo seals checked out. And I will ask the workshop ... if they had considered that, as they did not really know the cause. "None of Nature's landscapes are ugly so long as they are wild"
John Muir
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| 27th Apr 2010 12:29 pm |
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robharvey
Member Since: 14 May 2007
Location: Durban
Posts: 138
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AP
Happened to me a couple of months after I bought my vehicle (early 06). Turned off the vehicle, got out to go to lunch, heard vehicle still running, got back in, "re-started" it, turned off. Second time lucky. Never happened again.
Have a read here: http://www.disco3.co.uk/forum/topic13010.html?highlight=
Rgds
Rob
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| 30th Apr 2010 11:32 am |
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