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| hornet Member Since: 04 Jan 2010 Location: Western Europe Posts: 361  |
I read about the same behaviour. It turned out that pressure relief valve (mounted at the end of the rail) broke to pieces. Control is very easy. It must be one part (LR019009). More than one: broken and may be responsible for the engine idle you are describing....
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10th Oct 2015 2:54pm |
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| Jed Member Since: 24 Nov 2014 Location: Hertfordshire Posts: 25  
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Thanks for replying, I will give this a try and let you know
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10th Oct 2015 5:05pm |
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| Lorryman100 Member Since: 01 Oct 2010 Location: Here Posts: 2686 |
VCV valve, search for VCV valve on here, loads of posts.
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10th Oct 2015 5:06pm |
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| Jed Member Since: 24 Nov 2014 Location: Hertfordshire Posts: 25
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Thanks Lorryman
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11th Oct 2015 5:41am |
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| Jed Member Since: 24 Nov 2014 Location: Hertfordshire Posts: 25
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I took out the pressure relief valve and it didn't seem broken , there was a spring and a couple of other bits in there but I can't see how it could break. The engine light has now come back on and now it doesn't seem to have the power as if the turbo is not working, but it's not dying any more and starts ok, any ideas
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12th Oct 2015 8:12pm |
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| Coolcamper55 Member Since: 22 Apr 2010 Location: Inverclyde Posts: 45  
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I have been experiencing the same and after trawling thro the forum, I have
Replaced the VCV and had it programmed Replaced the EGR Replaced the MAF Replaced the MAP Replaced the CPS I thought it had cured but sadly not. Started looking at the electrical side now. Main relay seems a good place to start. Any advice would be most welcome Tommy Tommy 110 XS TDCi |
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3rd Dec 2015 7:36pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17372 
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Classic VCV symptoms. Any DTCs to go with it?
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3rd Dec 2015 10:38pm |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
(LR009837 part no. VCV and link to replacement
https://www.defender2.net/gallery/albums/u...VCV%20.pdf |
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4th Dec 2015 8:18am |
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| AlanH Member Since: 15 Mar 2010 Location: WA Posts: 242 
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I had the VCV thing changed recently in an attempt to stop the surging and engine nearly cutting out when foot off the throttle when the vehicle is cold.
Reprogramming done as well but hasn't made any difference at all. Engine rattles less but I'm worried that this may result in a stop and no restart when I'm in remote parts. I must admit that this is making me a bit paranoid and I keep finding yet more rattles etc. "The end is nigh" as the religious nutters used to say.... and in my case this means my association with Landies or Deafeners at least. AlanH. |
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4th Dec 2015 8:22am |
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| Caterham Member Since: 06 Nov 2008 Location: Birmingham Posts: 6298  
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Hi,
sorry if this is of no help but I find problems most notable when the engine was under low load ie trying to blip the engine in between gear changes and I believe it was due to air getting into the fuel. for me I believe it was nothing more than the fuel filter having not been fitted correctly / fully. Assuming the fuel filter is fitted correctly could air be getting in elsewhere? I assume there was no evidence of fuel leaking for me due to low pressure however I suspect there is a suction / negative pressure from the fuel pump up front and hence pulling air into the fuel? good luck. AlanH - just a though re rattles. I was concerned recently that the engine was starting to rattle which was noted as the temps here started to drop a little and thought the glow plugs or injectors were to blame....turns out it was the turbo heat shield bracked had become loose again. hope yours is a simple fix too. keep the faith. |
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4th Dec 2015 8:38am |
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| leonski Member Since: 14 Dec 2009 Location: Northumberland Posts: 205 
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Hi Sorry to jump on this post, but our 90 is also suffering from similar symptoms!
At first I thought it could be the turbo actuator sticking, as the vehicle has had total power loss and flagged up 'PO299 turbo under boost' error. But after disconnecting the arm on the actuator and giving it a manual pull and push I'm not sure, there is a little resistance at first but then it moves freely and as I'm not turbo expert I'm not sure if it is either the turbo or the actuator! The strange thing is it can go a week before repeating the power loss and now all I have to do is stop, turn the engine off, then on again and it is managing to reset itself. We have checked all the wiring from all the turbo sensors and it appears to be fine. When it stops raining I will now go and check the VCV thingy. You have to hate those invisible faults, I wish something would either melt snap or implode so you could visibly see what was wrong! |
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5th Dec 2015 12:31pm |
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| AlanH Member Since: 15 Mar 2010 Location: WA Posts: 242
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The thing used to be at it's worst in cold Winter mornings..... Perth WA cold (about 10C) not UK cold.
 Had the vcv valve changed and now it's getting much worse and nearly stopped completely this morning. This only happens on the short run I do to get the paper in the morning....I go a long way round but the total run is only about 3 kay.
We've got a remote trip planned for early new year but I think I'll call it off and get rid of it. I really can't be bothered any longer. "Keep the faith"? None left I'm afraid. AlanH. |
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11th Dec 2015 8:39am |
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| Treebeard Member Since: 27 Jun 2012 Location: Forest of Dean Posts: 40 
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We had a similar problem on a 2007 2.4 tdci. Turned out to be the fuel injection pump gradually breaking down and releasing bits of swarf which jammed the VCV. New OE fuel injection pump (surprisingly inexpensive) and job's a goodun. I found loads of stuff about this on transit van forums.
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12th Dec 2015 5:07pm |
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| AlanH Member Since: 15 Mar 2010 Location: WA Posts: 242
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Thanks Treebeard. Here in Oz I'd change your "surprisingly inexpensive" to bloody expensive as is the case with virtually all other stuff for Landies here.
I'm going to change the pressure relief valve and see what that does and will report back. AlanH. |
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16th Dec 2015 9:14am |
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