Just as it says - out of the blue - no noises or warning lights - lost 95% of initial acceleration in all gears till revs reach about 2200-2500 then power cuts in and pulls away like normal. Drivingwise I can compensate for it by holding revs up when pulling away from a stop and by changing down a gear when on the flat or slight uphills but it obviously ain't right! Its a D3 "poverty" with no air suspension, coming up to 4yr service but only 37k on clock and never been abused. Searching site gives me things like intercooler pipe split, egr problems and even turbo problems. Anyone had this before or care to make an educated guess? nick
18th Aug 2010 4:45 pm
Baben
Member Since: 15 Feb 2006
Location: Kyalami
Posts: 2059
so did you check the intercooler pipe between the engine inlet and the intercooler?
It won't necessarily have any obvious external damage, but oil seeping out the ends is a major clue, plus it gets hard and brittle
lots of smoke?
high fuel consumption?
throw us a bone if you want response
18th Aug 2010 4:53 pm
PaulP
Member Since: 04 May 2007
Location: Barcelona
Posts: 4317
Baben - wouldn't intercooler pipe failure cause an even bigger lack of power at high revs? It sounds like it is performing more or less correctly on boost.
Sounds like EGR to me (but then again we always have to say that because it usually is )2006 Discovery 3 TDV6 SE AutoBuckingham Blue 2007 Golf GT DSG
18th Aug 2010 4:58 pm
Baben
Member Since: 15 Feb 2006
Location: Kyalami
Posts: 2059
Nope. The symptoms described accurately reflect the delaminating intercooler pipe according to my experience (4 of them now on various D3's) apart from the unknown extra smoke and bad fuel consumption. Once on song, the turbo covers up the problem. Anyway, if Nick could be so kind as to grab a torch and go and look under his bonnet, he can tell us yay or nay
Hi Baben and PaulP ta for replies. No excess smoke emitting and no obvious oil in top end of intercooler pipe. My consumption is generally good inasmuch as a tankfill to near brim usually gets me about 540 - 550 miles. Not done enough distance with this problem to need a refill yet -and - before you ask - the "poverty" model doesn't have the fancy "fuel consumption" gizmo or the onboard computer display. If its the EGR's could it be electrical rather than mechanical thus allowing it to accelerate after 2200 - 2500 revs? I'll get the tools out tomorrow when SWMBO returns.
18th Aug 2010 5:24 pm
Baben
Member Since: 15 Feb 2006
Location: Kyalami
Posts: 2059
hmm. its a head-scratcher. Dodgy diesel? Did this just start after you filled up?
Have done about 350mls since last fill up with a couple of 100ish trips in there - one of which was after prob started. When I looked inside the top end of the intercooler pipe there was only a very light mist of oil/dirt on the liner - just enough to discolour your finger when I ran it round inside. I also had a look inside the "butterfly" part of the EGR - should the "butterfly" be sitting horizontal ie open? when the engine is switched off - I wasn't sure never having ventured into the guts of one before.
18th Aug 2010 6:32 pm
Matthewnoble
Member Since: 22 Sep 2009
Location: Cordes sur Ciel
Posts: 31
Ours has done the same - went for an MOT yesterday and was fine, but today has no power until the rev counter reaches 2500 - 2800 and then woosh away it goes. It was absolutely fine until the MOT test yesterday, we are ringing the garage to complain.
Ours has done 34601 miles (approx!) and is an 06 plate regularly serviced.
Perhaps its freaky power loss Wednesday!One day I'll get there!
18th Aug 2010 8:49 pm
woody32 Site Sponsor
Member Since: 11 Mar 2009
Location: Somerset
Posts: 3551
Blank off the i got a say it EGR valves its not a big job and don't forget to do the flap in the intake pipe and see if its any better i reckon it will be Wanted D4s non runners pm for competitive price.
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18th Aug 2010 8:59 pm
DJH68
Member Since: 23 Feb 2010
Location: West Midlands
Posts: 53
nick
your symptoms sound exactly the same as I had two or three weeks ago,even to the extent of how you are having to drive to overcome the problem. I had the egr valves blanked and now it is fine.
I would put any amount of money on it being this problem, and I actually have no mechanical experience,
one comment - you mention that the valve is stuck open, again i dont know how they work - but i do know that the guy who repaired mine explained that they stick open and therefore send exhaust emmissions back into engine at low revs - which is what they shouldnt do.
get them blanked and your problems will be over
also just thought that for a week or so before the problem arose I had noticed a louder than normal tappety noise on startup, - again mechanic suggested that this was probably the egr valves attempting to self clean, now blanked i do not get this tappety noise.
hope you get sorted soon, and get your d3 permagrin back
18th Aug 2010 9:27 pm
PaulP
Member Since: 04 May 2007
Location: Barcelona
Posts: 4317
Baben wrote:
Once on song, the turbo covers up the problem.
I don't follow this Anthony
If the intercooler hose is split (even slightly), then when the turbo spins up, it will force some of the air out through the split, and due to the fact that there is now less pressure/air-flow than expected going into the throttle body, the engine is effectively being over-fuelled which causes the smoke.
Apart from messing up the air/fuel metering a little bit at low revs, a split intercooler hose shouldn't cause massive problems off-boost.
Saying this, you've actually suffered from the problem so you would recognise the symptoms.
I stand by my original guess of the EGR valve(s) being d.
DJH68 - the OP was talking about the butterfly valve in the throttle body, not the actual EGR valve itself. The butterfly valve should only be closed when the EGRs are opened (i.e. to reduce emissions at lower revs and off-boost) - this way it forces the engine to suck in the "dirty" air from the EGR gas circuit and blocks the clean air from passing.2006 Discovery 3 TDV6 SE AutoBuckingham Blue 2007 Golf GT DSG
18th Aug 2010 9:46 pm
caverD3
Member Since: 02 Jul 2006
Location: Oberon, NSW
Posts: 6922
Stuck variable vane turbo, 2200-2500 revs is about where the vanes usually move.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
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DJH68 Just for the sake of clarification - I was only asking IF the butterfly valve SHOULD be sitting open when ignition was off - not saying it was stuck open. When I touched it with my finger it swivelled ok so didn't appear jammed anyway. As to whether it was swivelling at the correct time or not, if at all, I don't know.
Re mathewnoble's comment about being ok prior to MOT - I wonder if it was anything to do with the diesel emission test when it gets free accelerated up to its max unloaded speed a number of times. Perhaps its all been too energetic.
Looks like I'll have to read up on the various "founts of knowledge" then get hold of a kit. Bye Bye weekend!!
Whoops, hold that horse! While I was composing previous post CaverD3 slipped in with stuck vanes on the turbo. Any other signs or symptoms for identifying that? Are variable vane turbos fitted on all the D3 models? - bearing in mind mine is a 56 plate.
18th Aug 2010 11:22 pm
caverD3
Member Since: 02 Jul 2006
Location: Oberon, NSW
Posts: 6922
Variable vane turbos are fitted on all D3s. Early turbos have tendencey to stick and LR put out a software patch to exercise them at start up to prvent carbon buildup.
Not happened to me but others may know what the symptoms are but iit s a possible cause.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
Ernest Hemmingway
D4 3.0 Active Diff, Adaptive Lights, High Beam Assist, Surround Cameras, Privacy Glass.
D3 2.7:Adaptive Headlights,Electronic Rear Diff,ARB Bar,Blaupunkt Speakers,JVC Powered Subwoofer,Removable Snorkel,Mitch Hitch,Pioneer After Market Head Unit,Steering Wheel Control Adaptor,Remote Adjustable Supension Rod System, Taxside Dual Battery System.
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