 | Home > Technical > Help ! Dieseling tractor noise ? |
 
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| chalky Member Since: 09 May 2008 Location: Yorkshire Posts: 483   
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I'll try and describe this the best way I can but my 90 Tdci is making a weird tractor noise that is not dissimilar to the sound of a knackered engine !
When changing up mostly from cold after lifting off the clutch I get a weird kind of over run noise from under the bonnet area ! It happens at low revs and lasts for no more than a few seconds ? Any ideas ? Performance or should I say driveability is not affected and the economy does not seem too bad either ? In advance "much appreciated" DEFENDER XS CSW 08 TONGA GREEN |
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4th Apr 2009 7:09am |
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| CFB Member Since: 13 Sep 2007 Location: Bradford, West Yorkshire Posts: 803
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Is it like a very noisy diesel 'clatter' ? Mine does this, it really is very noisy, not sure if it is a problem or just a characteristic. When cruising along it's quiet, only happens under a bit of load in lower gears. Andy
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4th Apr 2009 7:41am |
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| Grockle Member Since: 24 Nov 2008 Location: Peak District National Park Posts: 2266
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Could be excessive fuel pressure 2.4 90 XS
1968 1/32 scale Britains 109 Pick up. |
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4th Apr 2009 7:50am |
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| chalky Member Since: 09 May 2008 Location: Yorkshire Posts: 483
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sounds to me very much like we have the same problem !
It seems to appear at a certain rev range as I have just been out in it now and it held the clattering noise for a good 10 seconds before picking up revs and the noise stopped. I slowed straight down and moved off and felt the pull onder load as it seems to run on under it's own steam as tho the clutch is being ridden ? The plot thickens ! DEFENDER XS CSW 08 TONGA GREEN |
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4th Apr 2009 7:56am |
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| CFB Member Since: 13 Sep 2007 Location: Bradford, West Yorkshire Posts: 803
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The run-on could be the anti-stall system? Andy
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4th Apr 2009 8:24am |
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| mse Member Since: 06 Apr 2008 Location: UK Posts: 5035 
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I think it could be an engine management cold feature as ive heard it a few times Mike
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4th Apr 2009 8:42am |
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| Grockle Member Since: 24 Nov 2008 Location: Peak District National Park Posts: 2266
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See latest thread on the Puma site. 2.4 90 XS
1968 1/32 scale Britains 109 Pick up. |
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4th Apr 2009 11:53am |
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| shingwell Member Since: 13 Mar 2009 Location: herefordshire Posts: 45
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I also get this problem, but in addition I have noticed that sometimes if I keep the clutch depressed and my foot off the accelerator, the engine "hunts" (revs up and down a bit) of it's own accord and then either the problem goes away or, occasionally, the engine management light comes on and the engine goes into limp mode, but is restored to normal as soon as you switch it off and on again.
The dealer said they could not find any fault codes logged, but I did not believe them (or they accidentally cleared them), so I have bought a scangauge (I was going to do this anyway) and finally logged a fault code - P1169, which apparently means excessive fuel pressure. I have yet to hear back from the dealer as to what they intend to do about it. I notice though, reading past threads on this forum and on the LRO forum, that this fault code is one of the symptoms of the water-in-fuel problem, although I'm not sure about the tractoring. I checked the location of the fuel tank breather and it is not in the "bad" position that causes problems, but nor is it in the recommended "fixed" position behind the lights - it's on top of the fuel tank (but it's a 130 so maybe the pipe wouldn't reach behind the lights). I will check for water in the fuel filter this weekend. |
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4th Apr 2009 12:33pm |
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| MK Member Since: 28 Aug 2008 Location: Santiago Posts: 2415  
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or
http://forums.lr4x4.com/index.php?showtopic=30857 Puma 110" SW ............................................................. Earth first. Other planets later |
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4th Apr 2009 1:48pm |
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| shingwell Member Since: 13 Mar 2009 Location: herefordshire Posts: 45
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Thanks for the thought MK, but I would not describe the noise as a "knock" at all - just a bit rougher and louder, as if standing outside beside an older diesel engine.
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4th Apr 2009 3:03pm |
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| The Boy Member Since: 28 Aug 2008 Location: East Northants Posts: 1459 
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This is how mine started. Then it got so bad that it would run away and the only way to stop it was to use the clutch. It took me 18 months to get lr to reconise the problem and that happend when the francise manager at my dealers was driving it and he nearly crashed it into a rr in the car park. I had a letter from the technical department saying they can not find a way to fix it. Thats why I have a new one waiting at the dealers to collect. Now it may be mine was an extream case but you may find the information useful.
Boy |
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4th Apr 2009 6:01pm |
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| mlightfoot Member Since: 10 Jan 2009 Location: Cheshire Posts: 86 
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Yes it is the clutch! I have a 2008 90 XS, did exactly the same thing between 2nd and 3rd when cold.
Took it to dealer, and guess what? The original Puma clutch did not have strong enough springs, there is a modified clutch now and they fitted the new one. It drives like a totally new car and the clutch is really light! Hope this helps. |
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5th Apr 2009 4:36pm |
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| nicks Member Since: 21 Aug 2008 Location: south coast Posts: 469 
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mines been in 3 times for this, its diesel knock, they have replaced a fuel valve but it still does it. the main chap at dealer said land rover at first thought it eas water in fuel, but have sisnce discovered its not that - they still don't know what is causing it...
usually from cold changing between 2nd to third. |
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6th Apr 2009 7:20am |
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| Tony_Hillerby Member Since: 03 Feb 2008 Location: Inverurie Posts: 36  
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Mine was exactly the same they replaced a couple of pressure valves/regulators on the fuel system and also found the tank full of water yet again. This has sorted the problem and would suggest that this is what is wrong with yours. They said they followed the tech bulletin about water contamination which mentions P1169 and P0089 fault codes. This bulletin has been posted on the site somewhere if you can find it.
Hope this helps. |
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6th Apr 2009 6:37pm |
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