OMG MY K&N FILTER!!! - Toyota Yaris Forums - Ultimate Yaris Enthusiast Site

02-27-2009, 10:11 AM

#11

ChinoCharles

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Drives: LB

Join Date: Jul 2006

Location: OH

Posts: 7,787

Quote:

Originally Posted by ddongbap

Not that I'm trying to disprove this or anything, then what causes brand new MAFs to fail?

Poor design. MAF circuit boards are sealed w/ silicon, and they are connected directly to the underlying hardware. Engine heat and general wear and tear can cause the plastics of a MAF sensor to degrade and allow some of that silicon to coat the thermistors and other good bits. This is usually the cause of "dirty" sensors... it actually comes from the sensor itself.

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