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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

jsamuelson
 


Member Since: 07 Feb 2011
Location: Cornwall
Posts: 214

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Santorini BlackDiscovery 3

I cleaned mine 45k ago, was gunky but not totally blocked. Cleaned it again today, gunky again and hole completely clogged. Car was very sluggish, still doesn't feel totally right after cleaning but noticeably better with much improved gear selection (assume good data from sensors = better decisions about gear selection in ECU).

I might buy a brand new sensor and keep the old one as a roadside spare.
  
Post #151601315th Aug 2015 12:34 pm
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Irwin
 


Member Since: 04 Aug 2015
Location: Internet
Posts: 270


Does the gunk inside the intake ever cause a problem? When i last cleaned the map sensor I scraped some of it out before refitting the sensor.
  
Post #151613815th Aug 2015 7:09 pm
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jsamuelson
 


Member Since: 07 Feb 2011
Location: Cornwall
Posts: 214

United Kingdom 2009 Discovery 3 TDV6 HSE Auto Santorini BlackDiscovery 3

The intake is fairly big so unlikely to be blocked to the point it causes an issue? Not sure.

MAP sensor on the contrary has a ridiculously small aperture. It's much bigger on the D4 sensor. So presumably someone knows this is an issue over at LR.
  
Post #151678317th Aug 2015 4:19 pm
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Weedyapl
 


Member Since: 23 Sep 2015
Location: Melbourne
Posts: 81

Australia 2005 Discovery 3 TDV6 HSE Auto Zambezi SilverDiscovery 3

My MAP sensor was caked not as bad as some on here though but it was still smooth, not blowing any black smoke with plenty of power. EGRs aren't blanked haven't had car long enough but I think ill do it at next service after seeing how cruddy the sensors getting.

I cleaned it haven't had a chance to drive it but it seems exactly the same other then I can definitely hear the turbo whistle a lot more whether that's a good thing or not will remain to be seen Thumbs Up
  
Post #154332412th Oct 2015 12:34 am
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mx468
 


Member Since: 12 Dec 2012
Location: Middletown, Rhode Island
Posts: 367

United States 2006 LR3 4.4 V8 HSE Lux Auto Tonga GreenLR3
Diesels only, right?

This is only for diesels turbos right. Not for the v8 4.4?
 Narpy's Grill Mod, Suspension Rods, Ultra guage, wrangler Goodyear duratracs 265/60/18, new thermostat, diff oils changed, brake switch new, aluminum rack floor, LED driving lights in foglights, rear camera, just need gvif unit, next on list! New front arb bushings, new front valve block, 191,000 miles.  
Post #154496615th Oct 2015 5:44 am
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Sedicivalvole
 


Member Since: 03 Nov 2014
Location: Nahariya
Posts: 9

Israel 

Before:
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After:
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Should I clean with carburetor spray inside?
  
Post #156226417th Nov 2015 9:26 am
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.olli.
 


Member Since: 17 Dec 2015
Location: Hampshire
Posts: 83

United Kingdom 2006 Discovery 3 TDV6 S Manual Zambezi SilverDiscovery 3

Not as bad as some on here, after 79k miles

Before:

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After:
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Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated Mr. Green
  
Post #16062897th Feb 2016 4:13 pm
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C4mbo
 


Member Since: 09 Jan 2016
Location: chesterfield
Posts: 37

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Java BlackDiscovery 3

That's a job for tomorrow then
  
Post #16064147th Feb 2016 7:28 pm
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euangibson
 


Member Since: 24 Dec 2010
Location: Borders
Posts: 11027

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Firenze RedDiscovery 4

Just remember not to stick anything into the hole.....there's a diaphragm in there that you could damage....flush it out with something like contact cleaner and let it drain/dry before refitting Thumbs Up
 "Better to remain silent and be thought a fool,than to speak out and remove all doubt" ?.....what rubbish...

Locking rear E-diff
RLD spare wheel protector & sump guard
Extended roof rails
Series 111 mudflaps
Black side tubes,grill and vents
Timed climate remote
Hids4u interior lights

D4 Firenze my2012 HSE
D3 Java 2005 SE manual (sold,sadly,thanks for the memories)
1966 '88 Series 2a....still starts in the morning better than I do... 
 
Post #16064167th Feb 2016 7:32 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73069

Ukraine 

What do D4 MAP sensors look like after a few years?
   
Post #16064197th Feb 2016 7:39 pm
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euangibson
 


Member Since: 24 Dec 2010
Location: Borders
Posts: 11027

Scotland 2012 Discovery 4 3.0 SDV6 HSE Auto Firenze RedDiscovery 4

I had a look at about 20k,clean as a whistle....I'll have another look this week (56k) Thumbs Up
 "Better to remain silent and be thought a fool,than to speak out and remove all doubt" ?.....what rubbish...

Locking rear E-diff
RLD spare wheel protector & sump guard
Extended roof rails
Series 111 mudflaps
Black side tubes,grill and vents
Timed climate remote
Hids4u interior lights

D4 Firenze my2012 HSE
D3 Java 2005 SE manual (sold,sadly,thanks for the memories)
1966 '88 Series 2a....still starts in the morning better than I do... 
 
Post #16064457th Feb 2016 8:15 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73069

Ukraine 

Thumbs Up
   
Post #16064477th Feb 2016 8:16 pm
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urhunden
 


Member Since: 15 Jan 2010
Location: Stockholm
Posts: 813

Sweden 2013 Discovery 4 3.0 SDV6 HSE Auto Java BlackDiscovery 4

Asked a question earlier but never got an answer.

Is it possible to use a ultrasonic cleaner to clean the MAP sensor???
  
Post #16064727th Feb 2016 8:42 pm
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DSL
Keeper of the wheelie bin 


Member Since: 11 May 2006
Location: Off again! :-)
Posts: 73069

Ukraine 

Way above my techie paygrade. Whistle
   
Post #16064737th Feb 2016 8:45 pm
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MrH
 


Member Since: 08 Aug 2007
Location: lost in the forest
Posts: 7754

United Kingdom 

What?! You have a paygrade? Shocked
 LRs are a fond memory, apart from the maintenance.  
Post #16064887th Feb 2016 9:00 pm
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