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Go and clean your MAP Sensor NOW!!!
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How's your MAP sensor?
EGRs blanked & MAP sensor gunky
13%
 13%  [76]
EGRs not blanked & MAP sensor gunky
60%
 60%  [352]
EGRs blanked & MAP sensor clean
13%
 13%  [80]
EGRs not blanked & MAP sensor clean
13%
 13%  [76]
Total Votes: 584

DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73082

Ukraine 

Good feedback peeps!! Hopefully this will help with the plunging mpg syndrome, naive to think it's totally fixed but we live in hope! Beno, my primitive & tongue in cheek "how to" in the first post of this thread. It's easy, if I can do it anyone can. Thumbs Up
   
Post #78434510th Apr 2011 10:41 am
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KevG
 


Member Since: 27 Mar 2011
Location: Gtr Manchester
Posts: 106

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Bali BlueDiscovery 4

Just cleaned mine. Got 39k on the clock.

Before

Click image to enlarge


After

Click image to enlarge


Taken it for a short run no apparent differences but will see if there's an improvement in mpg long term.

Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated Mr. Green
  
Post #78438410th Apr 2011 1:23 pm
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NickJ
 


Member Since: 11 Oct 2010
Location: there's no f in point
Posts: 2137

2006 Discovery 3 TDV6 S Auto Zambezi SilverDiscovery 3

Removed mine this morning... totally gummed up with the hole completely blocked. After cleaning, it may be the placebo effect but:

1. I'm sure there's more response from the the throttle; flooring it did seem to give a slightly better and more responsive acceleration
2. The fuel economy has increased by 0.1mpg over a drive of about six miles, not much I know but unheard of in my car
3. I've never noticed a turbo whistle, but now when accelerating there's a just noticeable whine that I' sure I've never hear before

Can it be true... are any of these attributable to the MAP sensor?

If the hole is completely gummed up then assuming that the sensor works on pressure whats to say that it's not oiled up internally so is still not working properly?I cant see how it comes aprt any more.

Bear in mind that the speed limit in Guernsey is 35mph, so is this what's happening in other parts of the engine? As far as I know the EGRs aren't blanked.
  
Post #78438610th Apr 2011 1:40 pm
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lad
 


Member Since: 17 May 2008
Location: Blackburn
Posts: 634

England 2005 Discovery 3 TDV6 S Manual Java BlackDiscovery 3

When I removed mine the end was covered over but when I cleaned the muck off I carefully used a pin and cleared the hole and there wasn't that much muck up there. I didn't go all the way up the hole because I could have damaged the sensor. The muck seemed to just cover hole a when I removed the muck from around the hole I must have pushed a bit up the hole. I don't think the muck would completely fill up the hole. But you never know Rolling Eyes
  
Post #78445410th Apr 2011 5:07 pm
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crwoody
 


Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

I cleaned the hole out in mine with a squirt of WD40 directed at it, I wouldn't advise sticking anything down the hole to dig the gunk out, there's a diaphragm inside with some delicate electronics behind it.

The gunky stuff is only oily soot anyway so it shouldn't take too much to flush it out.
 Clive

 
 
Post #78446110th Apr 2011 5:27 pm
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BrumLee
 


Member Since: 07 Mar 2008
Location: West Midlands
Posts: 1366

United Kingdom 2005 Discovery 3 TDV6 SE Auto Bonatti GreyDiscovery 3

Mine was all gunked up ;( Had a look at it after changing a split intercooler radiator Sad Sad Don't know if it made any difference as the new intercooler radiator would mask any changes Smile

[/img]
 Faultmate MSV2 EXTREME
FOXWELL N624 Elite
Hantek 1008c Oscilloscope 
 
Post #78468411th Apr 2011 9:55 am
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bigdave
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Member Since: 04 Jul 2008
Location: Cornwall
Posts: 9870

England 

Yep mine was filthy too.

Going for a run to the dealers Thursday so will report back any mpg increase - assuming the suspension fault doesnt get me firat.

Click image to enlarge
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Post #78472411th Apr 2011 12:51 pm
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lad
 


Member Since: 17 May 2008
Location: Blackburn
Posts: 634

England 2005 Discovery 3 TDV6 S Manual Java BlackDiscovery 3

I know it been said before, but look at all the gunk on all these sensors, just shows you what gunk is going into the engines and then land rover wonder why, (well I bet they don't) all these land rovers are failing in one way or another. EGR's may look after the environment but bu**er up your engine!!!
  
Post #78478111th Apr 2011 2:43 pm
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DiscoDunc
 


Member Since: 08 May 2006
Location: Bristol
Posts: 16390

England 2010 Discovery 4 3.0 SDV6 HSE Auto Aintree GreenDiscovery 4

just cleaned mine - done 130K miles and dirty, but not as bad as BigDave,s
 Duncan
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Post #78485911th Apr 2011 5:14 pm
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bigdave
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Member Since: 04 Jul 2008
Location: Cornwall
Posts: 9870

England 

Should have mentioned mine is 6.5 years on and up to 95k.
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Post #78487211th Apr 2011 5:40 pm
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NicSymonds
 


Member Since: 06 Nov 2006
Location: Bristol
Posts: 519

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

Blanked my EGR's last Saturday and cleaned the sensor, it was gunked up. Driven 200 miles since then, 170 on the motorway, MPG increased by 2-3 MPG. Average over the 200 miles was 33.4MPG
  
Post #78496111th Apr 2011 8:46 pm
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D4JWW
 


Member Since: 20 Oct 2009
Location: London, UK
Posts: 1318

South Africa 2009 Discovery 3 TDV6 GS Manual Stornoway GreyDiscovery 3

Checked mine today, late 2008(can't blank EGR's yet), only 26000 miles, long distance mostly, running best Diesel I can buy. Fairly clean
Click image to enlarge
 A few mods... and keeping it all running...Faultmate MSV2
MY09EGR's blanked Thanks Bellautos, BAS 
 
Post #78536512th Apr 2011 8:19 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73082

Ukraine 

Great stuff, keep em coming peeps! Doesn't look like there's any link between blanking EGRs. Idea
   
Post #78536712th Apr 2011 8:24 pm
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Trackman
 


Member Since: 16 Apr 2010
Location: Glasgow
Posts: 430

Scotland 

I don't want to start a debate on this subject but is anyone, who has a clean or near clean sensor using 2 stroke oil in their Diesel?

The 2 stroke is meant to act as a cleaning/de-coke agent.

Just curious Smile

Ian
  
Post #78539412th Apr 2011 9:40 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73082

Ukraine 

Or anyone with a gunky sensor used 2 stroke?
   
Post #78543913th Apr 2011 6:51 am
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