What kind of air flow sensor does subaru use in the WRX?

Discussion in 'General Subaru Discussion' started by Kosh, Aug 7, 2005.

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  1. Kosh
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    Kosh Well-Known Member

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    I was reading some opinions on various intakes and it seems like some of the problems associated with the intakes are based on the air flow sensor not reading correctly. I size up various flow elements for industrial applications all day long at my job so I am trying to understand what method is being used to measure the airflow. Does anyone know? Is it a thermal mass type or more of a pressure based sensor? Is it compensated for density?
     
    Kosh, Aug 7, 2005
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  2. RallyNavvie
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    RallyNavvie Well-Known Member

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    IIRC all 2000+ models use a hot-wire mass air flow sensor. Unless they went back to the ultra-touchy hot-film ones from the MY99 Subarus :x
     
    RallyNavvie, Aug 7, 2005
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  3. bikerboy
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    bikerboy Subie GOD Staff Member

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    they use both a hot wire MAF, and a Map sensor
     
    bikerboy, Aug 7, 2005
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  4. Kosh
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    Kosh Well-Known Member

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    What kind of signal do these sensors output?

    How do these sensors communicate with the ECU? Is it just a simple voltage or resistance?
     
    Kosh, Aug 7, 2005
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