Had to change MAP sensor coz it didn't like being cleaned
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Total Votes: 76
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72789
It's not the turbo hat goes, it's the variable vane linkage that packs up. New ones (since Sept) are slowed to have a better lubricated linkage so slight difference from old ones. We'll see.
I've ticked the no difference box, cos it didn't - but it was also changed about a week later by the Dealer in their quest to find my ESF fault - and after it went in it had the MAP fault code.
I think it was ok, based on my testing, but who I am to argue - I'll have had most things changed under warranty by the time they've found the fault Mark.
2006, D3 SE Auto - gone but not forgotten.
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16th May 2011 5:48 pm
Frapp
Member Since: 19 Dec 2008
Location: Norff Zummerzet
Posts: 1653
No difference at all
Still hesitant off the starting blocks and 21.1 mpg according to the lie o meter, but it is short trips.
If I reset the lie o meter before a trip up the M5 I can get 30+ so not all is bad.
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16th May 2011 7:17 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72789
16th May 2011 7:17 pm
NicSymonds
Member Since: 06 Nov 2006
Location: Bristol
Posts: 519
Cleaned mine and blanked the EGR's at the same time. Definitely made a difference, goes better and MPG increased by 2-3mpg.
16th May 2011 7:19 pm
jsamuelson
Member Since: 07 Feb 2011
Location: Cornwall
Posts: 214
My fuel economy definitely better and pickup definitely quicker. Medium oily gunk, hole not fully blocked.
I wonder, if after cleaning the auto has to re-adapt to different variables? After a couple of weeks it seems perkier, holding revs longer and kicking down sooner. What's the timeframe for it to adapt to a "new" driving style?
16th May 2011 7:23 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72789
150 miles ISTR.
16th May 2011 7:24 pm
irishrover
Member Since: 18 Aug 2008
Location: The Treaty County
Posts: 361
did a good long motorway drive yesterday, 120kph for 2 and half hours! no noticeable increase in pick up i dont think but even after the motorway drive im still on course to get 800km's from the tank i reckon! 765km's on clock when i parked @ airport yesterday and still a good bit above the light coming on so i reckon there is an increase in mpg, as previous driving at the run i did yesterday would have well and truly emptied her!
bearing in mind iv a manual and no cruise!
Member Since: 16 Mar 2011
Location: Peterhead
Posts: 32
One Word - Placebo Fraser
16th May 2011 10:04 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72789
Another word - disagree.
I've noticed and quantified immediate improvements and know what my car does performance and economy wise under neat to day conditions. Something to do with 130,000 miles driving 3 x D3s.
16th May 2011 10:20 pm
caverD3
Member Since: 03 Jul 2006
Location: Oberon, NSW
Posts: 6922
No difference but then mine wasn't blocked up, just dirty.“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely gamesâ€
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16th May 2011 11:27 pm
Dave T
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6902
At the moment it appears to go quite a bit better, was well gunked up before, will see about MPG when I fill up again, but the range has been going up since I cleaned it. Joined the BMWX5 45e group
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17th May 2011 7:33 am
Shiny Silver
Member Since: 27 Feb 2007
Location: Cambs
Posts: 170
Did the MAP sensor clean over two weeks ago at 55K miles. (Photos in my gallery before and after.)
Lots of crap around the sensor, but the hole was still clear... and that's probably why it made no difference.
20th May 2011 4:38 pm
KevG
Member Since: 27 Mar 2011
Location: Gtr Manchester
Posts: 106
After cleaning mine I'm now getting 2-3 mpg more. But I've also added redX so not sure what's give the improvement Not complaining either way though.
20th May 2011 4:49 pm
discodays
Member Since: 28 Nov 2010
Location: southend, essex
Posts: 52
after reading "go check your map sensor now" i did... choked up bad, i very carefully cleaned without any solvents, without probing more than a couple of mm into the hole with cotton bud and suction via an adapted mini vac through muslin and result!! ball bearing size lump out from inside........ and an increase in fuel economy, 4 mpg, had been 23.3....now 27.2. same driving pattern, same mileage, waited for a while to check findings. it did make a difference. now to do the egr blanking and butterfly removal as the crap that came off the map sensor was like tar........not good. Buck blue, auto, hse, Loving it !!!!!!!!!
i ain't loaded, paid over the odds, but hell this is the B******s
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765km's on clock when i parked @ airport yesterday and still a good bit above the light coming on so i reckon there is an increase in mpg, as previous driving at the run i did yesterday would have well and truly emptied her!
Not complaining either way though. 
