Member Since: 27 Jul 2018
Location: Greater London
Posts: 2
Hi all, cleaned the MAP this morning. Really easy job, 20 mins max from start to finish. Was covered in crud and gunk! Electrical contact cleaner and kitchen roll restored it perfectly well. Drove the car straight after and felt an immediate difference. Wouldn’t say it was suddenly quicker off the pedal, but the gear change from the auto was definitely smoother and the drive felt “tighter”....not sure how else to describe it. Not sure what else that sensor affects but the car definitely felt better. My EGR is not blanked off, so I guess periodic cleaning will be needed!!
28th Oct 2018 12:41 pm
Glenn of Belgium
Member Since: 29 Jul 2013
Location: Zeebrugge
Posts: 108
MAP causing trottle reaction?
Hello,
situation:
-A few weeks ago i had an "Engine System Fault" (with no power loss or malfunctions whilst driving)
-Cleaned out the butterfly housing
-Cleaned out MAP sensor with brake cleaner and some indirect low air pressure above the sensor, not
direct in sensor
-Fault disappeard
-since a few days now:
-Once in a while pushing the TROTTLE does not respond to the engine in 1ste/2nd gear whilst
accelerating from stop position...
-after some while problem is gone
it's NOT the feeling as if the turbo does not perform, rather like the trottle command is not beeing
confirmed and no extra fuel is injected...
-Rpm's stay very low and no power is generated
-had this with cold + warm engine
ENGINE = MY 2007 TDV6 D3 - 2,7L
Could this be a malfunctioning MAP sensor or maybe still gunk inside the sensor causing this?
Hope to hear some reaction, PM welcome!
6th Dec 2018 2:24 pm
Saiyuki
Member Since: 25 Feb 2018
Location: Oxford
Posts: 4
MAP sensor clean / replace
just to add to this chain.....
I recently had the map sensor replaced by James French (who are AWSOME btw). This is because apparently inserting a Q-tip is bad....who knew !!
in replacing the sensor I have discovered something potentially interesting. The 'gunk' in the inlet manifold and blocking the sensor may actually be contributed to by the failing of the sensor itself. From what I can see, learned, discussed, over time the effectiveness of the sensor diminishes (my D3 is 10 years old) and, as a result, the fuel mix ratio goes up, further exacerbating the problem through the unburned fuel that coats the inside of the inlet manifold through the exhaust recycling system. Having replaced the sensor I have a MUCH smoother engine with much more torque at lower revs and a much better improved fuel economy, currently showing 32MPG vs 25-6 MPG before. Im going to put half of that down to the desire to see how high I can get it but even so, its a lot better.
food for thought.
12th Dec 2018 8:03 am
Glenn of Belgium
Member Since: 29 Jul 2013
Location: Zeebrugge
Posts: 108
I've replaced the MAP sensor with a new one to be shure...
Seems the new editions have indeed a bigger whole.
After a few weeks now, SAME PROBLEM! = SOMETIMES no power with pedal on the floor, no revs are coming up, no smoke ... as if the pedal does not give signal to fuel pump...
Ideas please?
10th Jan 2019 11:31 am
gearmuncher
Member Since: 30 Oct 2018
Location: Woodley
Posts: 143
you need to start a new thread on that power problem !
27th Feb 2019 12:43 pm
Gazellio
Member Since: 08 Jan 2011
Location: Chilterns
Posts: 4130
HELP
Just cleaned MAP sensor which was incredibly dirty now got miriad of dash lights and faults including engine light warning /HDC/GEARBOX FAULT/ETc the lot in fact what have i done????
27th Mar 2019 12:40 pm
DIY Ace
Member Since: 06 Feb 2019
Location: Hampshire
Posts: 971
I doubt that cleaning the sensor will have caused any physical damage to those bits so I guess you have an electrical issue, or have damaged the sensor somehow.
Do you have fault codes?2022 BMW i4 M50. Bought Oct 2022. 10,200 miles and counting...
2014 BMW 435d convertible. Bought July 2021. 58,000 miles and counting...
2005 Discovery 3 HSE Auto. Bought Feb 2019. 169,000 miles and counting...
2009 Freelander 2 XS Manual. Bought Sep 2013. SOLD Aug 2021 (already regretted!)
Member Since: 20 Sep 2005
Location: Home and Happy
Posts: 6917
Re: HELP
Gazellio @ Prestige Cars wrote:
Just cleaned MAP sensor which was incredibly dirty now got miriad of dash lights and faults including engine light warning /HDC/GEARBOX FAULT/ETc the lot in fact what have i done????
Assume you didn't stick anything into the small hole on the sensor?Now Golf GTI PP, 7 speed DSG.
Ex D3 and D4
27th Mar 2019 1:10 pm
Gazellio
Member Since: 08 Jan 2011
Location: Chilterns
Posts: 4130
No just cleaned the crud very well and replaced then bingo Xmas tree every fault in the book gearbox UDC engine suspension all the lot before I cleaned it zero faults for a year!
27th Mar 2019 1:28 pm
Gazellio
Member Since: 08 Jan 2011
Location: Chilterns
Posts: 4130
Just noticed this from exhaust...
27th Mar 2019 1:34 pm
Beretta
Member Since: 11 Oct 2012
Location: Rochdale
Posts: 1180
I had this on my D3 once when i cleaned it, the sensor had to be replaced.2010 Disco 4 HSE
- Digital Dash Club
- GAP BT IID
27th Mar 2019 1:47 pm
Gazellio
Member Since: 08 Jan 2011
Location: Chilterns
Posts: 4130
"Assume you didn't stick anything into the small hole on the sensor?"
Yes I cleaned the hole in the center of sensor with a cotton bud and claened it very well right down to the silver metal contact....
27th Mar 2019 2:05 pm
Gazellio
Member Since: 08 Jan 2011
Location: Chilterns
Posts: 4130
Just off to get new sensor....
27th Mar 2019 2:05 pm
Gazellio
Member Since: 08 Jan 2011
Location: Chilterns
Posts: 4130
Beretta wrote:
I had this on my D3 once when i cleaned it, the sensor had to be replaced.
Did you get the mass of warning lights and faults with everything?
27th Mar 2019 2:06 pm
Beretta
Member Since: 11 Oct 2012
Location: Rochdale
Posts: 1180
Gazellio @ Prestige Cars wrote:
"Assume you didn't stick anything into the small hole on the sensor?"
Yes I cleaned the hole in the center of sensor with a cotton bud and claened it very well right down to the silver metal contact....
That's the issue i think, if you stick anything in the hole it breaks it
When I cleaned mine, I wasnt as delicate as I should have been and it caused all the errors you have had. But be sure is making a good connection, as from memory you get the same errors when its disconnected2010 Disco 4 HSE
- Digital Dash Club
- GAP BT IID
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