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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 : 1871 Replies : 12Users Viewing This Thread : |
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Jun 23rd, 2021, 15:11 | #1 |
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Mass Air Flow Sensor
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 |
Jun 23rd, 2021, 15:51 | #2 |
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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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Jun 24th, 2021, 08:20 | #3 |
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Air Flow Sensor
I got the tip from Scotty Kilmer of Youtube. Are you correct it glows hot when engine is off?
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Jun 24th, 2021, 10:42 | #4 |
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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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Jun 28th, 2021, 11:03 | #5 |
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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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Jun 28th, 2021, 14:44 | #6 | |
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Quote:
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Jul 18th, 2021, 20:19 | #7 |
Miketwovolvos
Last Online: Apr 26th, 2024 17:14
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air mass meters
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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Jul 18th, 2021, 21:39 | #8 | |
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Jul 19th, 2021, 16:20 | #9 |
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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 |
Jul 19th, 2021, 21:59 | #10 |
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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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