Member Since: 15 May 2022
Location: Surrey
Posts: 14
Just checked mine—100k Mileage, EGRs intact.
Very gunky!
The hole was partially blocked, I gave it a good clean and carefully used a drill bit to screw the crap back out the hole.
Started the engine just to check I didn't the sensor and immediately noticed the cranking was more "keen" and rumbled into life more confidently if that makes sense
Gave it a couple of small revs and 100% revved up faster off idle, it's definitely no placebo.
Going for a long drive tomorrow to see my parents so ill know then for sure, my MPG is pretty good anyway so not expecting much in terms of economy but maybe the motor will feel smoother and a bit more responsive!
Cheers for the tip
17th Sep 2022 2:13 pm
sub
Member Since: 04 Jul 2022
Location: Cheshire
Posts: 100
Wow, that was some time well spent!
Rather gunky, but easy to wipe off the exterior mushroom and then slowly pick at with a screwdriver, few blasts of MAF cleaner to finish it off. Might be placebo but I agree with Banesworld, easier to crank and noticeably more reactive to throttle.
18th Mar 2023 1:14 pm
doxon
Member Since: 29 Apr 2023
Location: Oxfordshire
Posts: 3
134k with EGRs.
Boy oh boy was this worth doing! Has made a huge difference to the way the car drives.
Click image to enlarge
Forgive my ignorance but what is the name of the assembly this connects to and are there guides for cleaning it? There was a lot of build-up that I could see on the inside...
14th Dec 2023 10:42 pm
faulksy
Member Since: 24 Dec 2023
Location: powys
Posts: 344
is it the same on the d4 ? and any pics were it is. thankshad a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
7th Jan 2024 11:19 pm
Maddpuk
Member Since: 25 Aug 2023
Location: Barnard Castle
Posts: 40
Member Since: 24 Dec 2023
Location: powys
Posts: 344
thank you sir.
just ordered some maf and map cleaner had a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
8th Jan 2024 6:56 pm
faulksy
Member Since: 24 Dec 2023
Location: powys
Posts: 344
just cleaned my map sensor, quite clean, done mafs as well. used the ar2810 brilliant stuffhad a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
10th Jan 2024 7:00 pm
faulksy
Member Since: 24 Dec 2023
Location: powys
Posts: 344
[quote="doxon"]134k with EGRs.
Boy oh boy was this worth doing! Has made a huge difference to the way the car drives.
Click image to enlarge
Forgive my ignorance but what is the name of the assembly this connects to and are there guides for cleaning it? There was a lot of build-up that I could see on the inside...[/quote
intake manifold/plenumhad a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
10th Jan 2024 7:02 pm
Kernowek
Member Since: 24 Oct 2023
Location: Cornwall
Posts: 14
I recently blanked the EGR valves on my 2004 D3 but didn't check the MAP sensor at the time. As part of a current fault finding mission I finally pulled the sensor and cleaned it, what a state...
Click image to enlarge
21st Jan 2024 11:26 am
disco chris
Member Since: 25 Apr 2022
Location: London
Posts: 292
Wow... that must be as bad as it gets.
Do you think you got it all clean, or worth buying a new sensor as it's that bad?
You should notice a big improvement in the way the car drives after cleaning all that muck off
21st Jan 2024 2:10 pm
Kernowek
Member Since: 24 Oct 2023
Location: Cornwall
Posts: 14
That's what I thought, I couldn't imagine it getting much worse than that!
Mine is 20 years old with 218k miles, I only picked it up last year from a mate, and the EGR valves were presumably original and presumably this sensor was also original hence why everything was so choked up.
I'm sure I would have noticed a difference after cleaning, if I didn't also have a boost leak somewhere to find and fix first.
22nd Jan 2024 11:30 am
disco chris
Member Since: 25 Apr 2022
Location: London
Posts: 292
Long shot but the boost leak code couldn't be linked to the dirty MAP sensor or the MAP sensor cleaning could it?
22nd Jan 2024 12:31 pm
Kernowek
Member Since: 24 Oct 2023
Location: Cornwall
Posts: 14
I had the power loss and underboost code before pulling the MAP sensor and cleaning it, but I suppose the sensor could be broken and needs to be replaced.
22nd Jan 2024 12:45 pm
Maddpuk
Member Since: 25 Aug 2023
Location: Barnard Castle
Posts: 40
Checked mine yesterday
Click image to enlarge
Cleaned with contact cleaner and no noticeable difference to performance etc. - no surprise as it didn't appear blocked.2014 Discovery 4 HSE
2013 Insignia Sports Tourer BiTurbo 4x4 SRi
2004 S2000
Honda FourTrax TRX300
- Paul
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the sensor and immediately noticed the cranking was more "keen" and rumbled into life more confidently if that makes sense 
