Quote:
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.
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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 ...