Member Since: 09 Sep 2010
Location: birmingham
Posts: 27
Discovery 3 diesel extremely slow to accelerate
Discovery 3 diesel extremely slow to accelerate... Auto gear box .......
When pulling away over the last couple of days my discovery hardly moves until the engine revs get to approx 3000 rpm ( not sure if this is anything to do with the turbo cuttting in ?) Then it accelerates as normal going through the gears normaly in the auto box.
Ive tried taking it out of the auto mode and putting it in first to accelerate but it still hardly moves till about 3000 rpm.
Ive been trying to work out if its the gearbox causing the problem or the engine.... and im sure its the engine as the box changes up and down fine above 3000 rpm.
if you kick the acceleartor to the floor to try and pull away the acceleration is as slow as ever
It was intermittant at first but now its all the time.
Was concerned it could be fuel contamination but im sure it would be running rough and the engine idles and runs fine just doesnt accelerate below 3000 rpm
Its extremely dangerous as you could walk faster out of a junction (and had a very near miss with an angry truck driver up my backsude this morning )
No messages shown on the dash, although a transmission fault has come and go approx 6 times over the last 12 months but its affected nothing.
Please could someone tell me if there is a fix for this or if it has to go to the dealer
Tried disconnecting the battery over night to see if it made any difference but nothing re set .......
Glyn
9th Sep 2010 7:24 am
caverD3
Member Since: 02 Jul 2006
Location: Oberon, NSW
Posts: 6922
Sticking variable vane turbo vanes? “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.
9th Sep 2010 7:36 am
foxiey
Member Since: 09 Sep 2010
Location: birmingham
Posts: 27
caverD3 wrote:
Sticking variable vane turbo vanes?
Is there anything that can be done for sticking guide vanes ( ie i work as an aviation technician and we can lubricate them on the aircraft?) or is it a sealed unit on the discovery ?
What does the EGR do as some people I see suggest blanking this off if there is a loss of power .. and if so where is it ?
Sounds like EGR valves to me Now an ex-D3 owner after 7 happy years. Miss the car but not the big bills
9th Sep 2010 7:53 am
caverD3
Member Since: 02 Jul 2006
Location: Oberon, NSW
Posts: 6922
foxiey wrote:
caverD3 wrote:
Sticking variable vane turbo vanes?
Is there anything that can be done for sticking guide vanes ( ie i work as an aviation technician and we can lubricate them on the aircraft?) or is it a sealed unit on the discovery ?
There was a software update to 'exercise the ' the vanes to stop them sticking but if the vanes have stuck it is usually a new turbo. But given your job maybe you be the first find a way fix it?
foxiey wrote:
What does the EGR do as some people I see suggest blanking this off if there is a loss of power .. and if so where is it ?
Could be EGR failure but this will bring up adifferent fault code. Have you had the fault codes read yet?“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.
Do a search on this site for EGRs. You will find plenty of information on them believe me
What model year is your car?Now an ex-D3 owner after 7 happy years. Miss the car but not the big bills
9th Sep 2010 8:39 am
Wildrover
Member Since: 19 Jul 2005
Location: Walkabout
Posts: 628
Agreed sounds like EGR valves
Not the end of the world if it is, a couple of hours to blank and the car will run even better.
Blank kits available online.
9th Sep 2010 9:05 am
discoBizz
Member Since: 20 Sep 2008
Location: Manchester
Posts: 1416
EGR valves would register a fault in the diagnostic though, even on IDS
Member Since: 08 Feb 2010
Location: Skoatland
Posts: 912
For the £5 parts cost and 2hrs of your time, I'd blank the EGRs first and see if that fixes it.
9th Sep 2010 10:00 am
foxiey
Member Since: 09 Sep 2010
Location: birmingham
Posts: 27
The AA mechanic man has just been out and plugged a diagnostics computer in and there are no faults logged
He thinks the EGR fault would have shown up on his computer if they were the cause ?
The car is a a 54 plate
He suggesting Landrover plug it into their diagnostics computer ... Im a bit fearfull of the cost !!!
9th Sep 2010 10:23 am
TallPaul
Member Since: 03 Jan 2008
Location: Near Reading
Posts: 1214
EGR.
Don't always show on the computer, also some clear after ignition cycle.
Exact description of how ours drove with dead EGR's....
9th Sep 2010 10:44 am
mik
Member Since: 08 Feb 2010
Location: Skoatland
Posts: 912
Then I'd repeat my advice above.
If that doesn't clear it, also worth reading THIS THREAD and reviewing the pdf document linked in it. This suggests you may be able to get an open-ended spanner on the VNT actutor, so you'd be able to tell if it is stuck or not. No idea how accessible this is on a Disco3 (just 'cos I haven't looked )
9th Sep 2010 10:48 am
mik
Member Since: 08 Feb 2010
Location: Skoatland
Posts: 912
No affiliation, other sources are availabile etc etc
9th Sep 2010 10:51 am
THFC
Member Since: 01 Sep 2010
Location: Biggin Hill
Posts: 743
Hi foxiey, sounds like EGR valves to me. My54 was doing exactly same as yours. I had it on 3 seperate diognostic machines (1 at landrover dealers) and no fault codes came up at all. Just got my blanking plates delivered and i'm just about to change them now so i'll let you know how it goes.
If it is EGR's go and see BAS on the forum and get them from there.
THFCPRIDE OF NORTH LONDON
AUDERE-EST-FACERE
9th Sep 2010 11:34 am
zig
Member Since: 09 Sep 2005
Location: Scotland
Posts: 650
Sounds very much like the problem I had which was due to the EGR valves.
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