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Is there summat I should know about MAF sensors?

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Charlie Dog View Drop Down
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    Posted: 01 Dec 19 at 14:54
The sensor on our T5 is held in 
with anti-tamper screws.

Haynes simply says it's 
a delicate bit of kit.

Aren't all sensors?

So, why have VW used 
anti-tamper screws please?

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Vanorak
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Post Options Post Options   Thanks (0) Thanks(0)   Quote T5 TDI Quote  Post ReplyReply Direct Link To This Post Posted: 01 Dec 19 at 15:50
I think most modern airflow sensors use a film instead of a wire and the film is delicate and can be wrecked by cleaning especially with some chemicals (although most people seem to ignore this.)  VW probably would rather owners left it alone hence the screws.  

A hot wire sensor or a hot film sensor works by the cooling passage of the airflow changing the conductivity across the sensor.  The ECU compares this with a reference voltage to decide how much air is passing the sensor. 
2004 2.5 174
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Charlie Dog Quote  Post ReplyReply Direct Link To This Post Posted: 06 Dec 19 at 20:41
Thank yuo very much T5 TDI :o)
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