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S40 / V40 '96-'04 General Forum for the Volvo S40 and V40 (Classic) Series from 1995-2004. |
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Mass Air Flow SensorViews : 1850 Replies : 12Users Viewing This Thread : |
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#1 |
New Member
Last Online: Apr 11th, 2022 13:29
Join Date: Oct 2019
Location: Exeter
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Just to let folks know. I removed my Mass Air Flow Sensor from my V40 2002
Cleaned the sensor with special cleaner off Ebay and refitted the vehicle runs even better. I do this every time I carry out an oil change every 5k miles |
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#2 |
Experienced Member
Last Online: Today 14:28
Join Date: Jun 2007
Location: L/H side
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How does it get " Dirty" ? Its fed with clean filtered air .... and is cleaned every time you turn off the ignition ( It glows white hot ) Be very wary of doing anything with your £300+ Air mass meter i have seen them ruined by doing this .
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#3 |
New Member
Last Online: Apr 11th, 2022 13:29
Join Date: Oct 2019
Location: Exeter
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I got the tip from Scotty Kilmer of Youtube. Are you correct it glows hot when engine is off?
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#4 |
Experienced Member
Last Online: Today 14:28
Join Date: Jun 2007
Location: L/H side
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Yes on the ones up to around 1991 with the wire filament the later are solid state but still with a hot surface ...
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#5 |
New Member
Last Online: Jun 7th, 2024 17:21
Join Date: Sep 2020
Location: Aylesbury
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I've cleaned many a grubby MAF in this way on Volvos and other cars, never had a problem and it's always improved the behaviour. The air being drawn past the wires isn't perfectly clean as the relatively cheap and crude filter used don't 100% scrub the air. Nor is the unit hermetically sealed. After thousands of hours there will always be unwanted particles in there affecting the performance.
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#6 | |
Experienced Member
Last Online: Today 14:28
Join Date: Jun 2007
Location: L/H side
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#7 |
Miketwovolvos
Last Online: Apr 26th, 2024 17:14
Join Date: Apr 2015
Location: Birmingham
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in my experience with a 940 and an s40, the Air Mass metres are pretty much immortal..the only prob I ever had was with the connections to them, just a misaligned pin or the pins not being 100% tight/well fitting. I put a large tie around the one on the 940 and had no further problems. I have two spare Air Mass Meters I pulled out of cars in 2002 and have never used. The wire heating/burn off when the engine is switched off is a very cool Bosch system which is very robust in my experience...
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#8 | |
Experienced Member
Last Online: Today 14:28
Join Date: Jun 2007
Location: L/H side
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The Following User Says Thank You to Clan For This Useful Post: |
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#9 |
VOC Member
Last Online: Today 19:14
Join Date: Mar 2008
Location: Northampton
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My previous V40 did 370,000mls without ever cleaning the maf. Ran like a dream until rust killed the body.
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2001 V40 2.0lt Sport Lux - Daily Driver. 178k miles. 2003 C70 2.4 GT Convertible - Garage Queen. 67k miles. http://www.neptuno6benagil.com |
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#10 |
Experienced Member
Last Online: Today 14:28
Join Date: Jun 2007
Location: L/H side
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I'd like someone to explain how they think the air mass Meter get "dirty" with clean highly filtered air going through them ...
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