Member Since: 22 Jan 2010
Location: Leicestershire
Posts: 1791
Certainly not just D3's that are suffering with this, the one on my 57 plate transit was totally gunked up when i checked it today, the van is on 33k but it had a new one fitted at about 15k
17th Apr 2011 8:29 pm
character
Member Since: 31 Dec 2007
Location: wiltshire
Posts: 5781
DSL wrote:
Thought the black stuff had evolved over those 400k miles.
like something out of Dr Who........... THE MAP Goo is goin to get yer
On a more serious note, had a look at Hitachi's website just to see what availabilty might be like given events over there recently, I recon they'll be a supply chain shortage so get yer order in asap to yer local LR stealer, mine will be ordered first thing on monday coz with that amount of black mess, I can only guess at what the inside was like
17th Apr 2011 9:04 pm
ZacSmith
Member Since: 26 Aug 2010
Location: Dover
Posts: 709
First big run out (80 miles at an average speed of 61mph) saw me at 30.3mpg (indicated) for the first time since I got her. I messed with the trial by adding redex to a full tank for the first time too. Whatever, it's given me another 2.5mpg.VIN: A175A328***
17th Apr 2011 9:28 pm
character
Member Since: 31 Dec 2007
Location: wiltshire
Posts: 5781
dont foget to vote peeps
17th Apr 2011 9:33 pm
hughes_jh
Member Since: 09 Jan 2011
Location: Warwickshire
Posts: 294
Mine was gunky on my non-blanked '56 D3. A quick clean and a drive out seemed to improve on the MPG by 1-2 ermmmm... MPG's! (although a couple of other things I did were more likely to help this)
17th Apr 2011 9:44 pm
azurar01
Member Since: 24 Feb 2011
Location: Gloucestershire
Posts: 509
Hi, Did mine at the weekend, same as most people, gunked up after less than 40k miles.D4 SDV6 HSE 11MY - Gone
D3 TDV6 HSE 08MY - Gone
Looks like two types of gummed up MAP’s, some seem to have plenty of “goo†around them however the aperture appears to be clear, others like mine appear to have the aperture covered as well, possibly blocked ???
It’s not just a case of driving styles either; I drive mine in Sport mode quite a lot, also use command shift as well.
Maybe of use, if people could mention on this thread if they add fuel additives / 2 stoke oil etc.
I only use normal diesel (lots of it as well)
SydIn Spain - 2018 F Pace - Down and out's Velar
In UK - Dare not say on this Forum
Gone - Lots of Lode Lane vehicles.
- Beta User
18th Apr 2011 9:18 am
azurar01
Member Since: 24 Feb 2011
Location: Gloucestershire
Posts: 509
Hi Syd, I use standard supermarket fuel with a tank of V power every 4th fill up; no two stroke.
I have been wondering why the build up occurs.
Here are my assumptions:
1. The build up occurs on vehicles with EGR's working, I.e. for those with blanked EGR's there should be no new build up.
2. The MAP sensor is positioned just after the EGR's entry to the inlet manifold, hence its right in the firing line for any unburnt crap from the exhaust.
3. It would not occur in the turbo housing as the temperature remains high, e.g. no condensate .
From what I can gather EGR's only operate at part throttle; True ?
Does anyone know what causes the EGR's to open ? Is this done on MAP pressure / load / throttle ?
Member Since: 31 Dec 2007
Location: wiltshire
Posts: 5781
well after cleaning mine yesterday, performance was good from pick and more importantly, got 237 miles out of half a tank when towing all day long around the M25/A12 area.... so much so that I stuck another £30 in thinking that the sensor was knackered, now home with 438 miles completed on a full tank (give or take the 2/3rds of a quarter of the tank left by topping it up earlier).
To be on the safe side, have ordered up another one before Hitachi run out, £116 before me discount
18th Apr 2011 9:00 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73135
That's great, I just wish the penny had dropped a while ago. I'd have saved a mini fortune since October when mpg went Pete Tong.
18th Apr 2011 9:05 pm
character
Member Since: 31 Dec 2007
Location: wiltshire
Posts: 5781
tell me about it, I recon it costs me around an extra £11-15 per fill up over the past "x" amount of months so in real terms £100's
18th Apr 2011 9:14 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73135
Somebody's got to keep the oil companies and government in the manner etc. Somebody has to pay for 2 aircraft carries that nobody wants.
18th Apr 2011 9:17 pm
AndrewW
Member Since: 06 Aug 2007
Location: Saddleworth
Posts: 2302
Click image to enlarge
Done this morning. 15 minutes.
MAP sensor not pleasant, but gunk not blocking hole. Gunk cleaned off. Hole squirted with brake cleaner. Replaced.
Set of 9 Torx offset keys (T10 to T50) that I bought a fortnight ago came in handy - £3.99 at TKMaxx
Just completed 74.8 miles in 102 minutes and 27.1mpg (D3 computed) - not unusual for such a trip.
A2006 D3 finally swapped for a 2016 D4 Graphite in Graphite grey. No mods
18th Apr 2011 9:18 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73135
Weird thing is my pic shows hole not bunged up but still good health improvement in pickup & mpg. Was wondering in that case of the oil/gunk affected the air flow past the sensor which affected it's operation. The blue O ring is well back so the gunk is in the air stream.
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Thought the black stuff had evolved over those 400k miles. 
