Mass Air Flow Sensor

[creronr123]

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

[Clan]

Originally Posted by creronr123

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

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 .

[creronr123]

I got the tip from Scotty Kilmer of Youtube. Are you correct it glows hot when engine is off?

[Clan]

Originally Posted by creronr123

I got the tip from Scotty Kilmer of Youtube. Are you correct it glows hot when engine is off?

Yes on the ones up to around 1991 with the wire filament the later are solid state but still with a hot surface ...

[V40onepointeight]

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.

[Clan]

Originally Posted by V40onepointeight

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.

Have you noticed how clean the inner surfaces of the air filter cover and the air inlet pipes are from the air filter element to the point where the Breather fumes are admitted ? "dirty" air mass meters are just not a problem on the many thousands of Volvos running around out there on the roads ... Mainly people spray stuff on perfectly good clean air mass meters when the problem is something else I have found ...

[Onetime volvo man]

Hi, I have a new, unused Air Flow Mass Meter part ref 0280218045 if anyone is interested. A small payment that I can give to charity would be nice but it’s free to collect if you email me.