Cleaning Mass Air Flow Sensor? - Defender Source
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  #1  
Old November 18th, 2011, 12:00 AM
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Brett
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Cleaning Mass Air Flow Sensor?

So this (Sagem) Mass Air Flow Sensor thing (picture attached)... the manual describes a removing and "cleaning" procedure... supposedly a good step in troubleshooting idle-issues.

How does one 'clean' it?

I pulled it out and was able to wipe a thin layer of dust/much off the inside of the large pipe. The mesh part didn't look dirty or that it would inhibit flow in some way, but i blew it with a little compressed air just to be sure.

Electrical contacts looks nice and clean.

It seems the 'sensor' part is behind the mesh screen and not very accessible. Am I meant to get in there and clean it some how?
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  #2  
Old November 18th, 2011, 05:38 AM
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Bill Adams
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The device works by running current thru the thin wire behind the screen, heating it. Air moving past the wire cools it. The amount of current needed to keep the wire at the set temperature is converted to signal sent to the engine ECU. Do not use anything to "clean" the wire. Simply check that the screen is clear of obstruction and there are no restrictions in the throat.
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Old November 18th, 2011, 08:07 AM
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there is a spray available by the name of Mass Airflow cleaner, if you use it be sure the maf is fully dried before reisntallation.
the d2 maf is an updated version of the sagem and it is trouble some, we have saved a few by using this cleaner.
goor luck.
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  #4  
Old November 18th, 2011, 11:39 AM
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thanks for the detailed info guys.
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