Last week or two I've noticed the viscous fan coming on a lot more than usual. Each time it happens as I'm gently accelerating after bimbling along at about 60, dropping to 30 or so because of traffic, then accelerating again. When it happens, the autobox seems to slip and hunt. As the box settles down, so the fan goes off.
Usually happens when I've been pootling along on a moderate throttle, have to slow briefly, then gently accelerate again. Have also had it happen in town when trickling along at 5-10mph in traffic. Temp gauge is smack-bang in the middle, so the engine isn't suffering, but the autobox doesn't seem too happy.
Transfer box was replaced under warranty about 3 months ago due to the lining of the TB shedding and contaminating the oil. Wondered if perhaps the gearbox was showing signs of suffering the same fate
Didn't notice this in my old car, regardless of weather, so a bit concerned, although at this stage I'm happy to sit on it and monitor for further deterioration before booking it in. Anyone else experienced these symptoms or got any ideas?I know it's not considered "kind" to say no these days, but no. Just no, ok? And if it's not ok, still no.
29th Jun 2009 10:20 am
SJR
Member Since: 09 Aug 2006
Location: East Manchester
Posts: 4030
do you think your eco driving experiment could be messing up the adaptive nature of the gearbox ?I believe that every human has a finite number of heart-beats. I don't intend to waste any of mine running around doing exercises.
Buzz Aldrin (1930 -
You mean it's Dave's way of telling me he wants me to give him a good spanking?
Dave is the car before any forum members by the name of Dave start getting worried.I know it's not considered "kind" to say no these days, but no. Just no, ok? And if it's not ok, still no.
29th Jun 2009 10:29 am
AndrewS Tarquin of the Desert
Member Since: 06 May 2005
Location: Y...... because I can
Posts: 10438
I had this issue and for the life of me I cant remember what the cause was. I think a new VFan and ...... wait hang on er yes thats it air intake temp sensor In the Beginning there was nothing, which exploded.
29th Jun 2009 12:39 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72787
NoDo$h wrote:
You mean it's Dave's way of telling me he wants me to give him a good spanking?
Using the Site Search and your suggestion, I came up with this thread http://www.disco3.co.uk/forum/post146831.html#146831 (nothing useful came up in the first page of results when I just searched for viscous fan before posting the question)
So I'll give the fuel temp sensor a bit of a jiggle this weekend when I do my mid-service oil and filter change to see if this helps. If not, then the air sensor as you suggest is next on the list to check. It's not the intercooler as this D3 hasn't been out in the gloop and crud.I know it's not considered "kind" to say no these days, but no. Just no, ok? And if it's not ok, still no.
29th Jun 2009 12:54 pm
matt_tdv6
Member Since: 05 Feb 2009
Location: Lincolnshire
Posts: 937
I have a spare viscous fan coupling without the fan
I had to replace mine as the fan was broken and isnt available seperate...Very expensive from LR
Very kind Matt, but if it's more than wiggling a sensor to fix it, LR can have the pleasure of paying for it under warranty 8)I know it's not considered "kind" to say no these days, but no. Just no, ok? And if it's not ok, still no.
ND - mine's doing this at the moment plus I get a warning message "Engine System Fault" when I slow down after being on the motorway. But no power loss, warning lights etc.
I took it to the dealer a few weeks ago; the code came up with faulty sensor; was told I could continue driving, including going on holiday; dealer replaced the air temp sensor on Friday...
It got a bit worse...but the bottom half of my intercooler needed a good clean as after I removed the protection plate yesterday I found it was completely enclosed in sand and mud ( ) ...
So your's is probably not due to mud - but could be the faulty air temp sensor...? This is was posted on my OP when I put up the issue. Might help ?
P2199-22
Intake Air Temperature 1/2 Correlation
- Sensor signal amplitude above maximum threshold
- Intake air temperature (IAT) sensor circuit high resistance, short circuit to power
- Air charge temperature (ACT) sensor circuit high resistance, short circuit to power
- IAT sensor failure
- ACT sensor failure
- ECM failureThe next American ex-pat that calls it a "truck" is going to find out what 2.7 tons feels like on their foot...
Club "yes, I too have had the EGR's replaced..."
Club "yes, I too have had the compressor replaced..."
Club "yes, I too once had the car at the dealer for a couple of weeksnearly 4 weeksover 4 weeks...5 weeks"
Club "yes, I too have had EPB failure..."
Club "yes, I too get mysterious bings and bongs..."
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air intake temp sensor 
good clean as after I removed the protection plate yesterday I found it was completely enclosed in sand and mud ( 
) ...
