2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

86 N/A S4 MFM AFM meter door readings

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Old Oct 1, 2021 | 08:21 PM
  #1  
rlynchster's Avatar
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86 N/A S4 MFM AFM meter door readings

Hello,

The FSM says 50 - 500 ohms for the MFM mass airflow meter door opening . . .As more air comes in the door opens up more .

. Between pins E2 and Vs

Open 50 to 500
Closed 50 to 500

86 S4 N/A

What I want to know is if that is a sliding scale where closed is 50 ohms and full open is 500 ohms?. . Or is it gotta be somewhere in that value between open and closed at any point on the sliding scale.

Anybody?
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Old Oct 7, 2021 | 06:08 AM
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It does not seem to follow a smooth increase like the TPS, so if its between you are set.
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Old Oct 7, 2021 | 11:54 AM
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From: https://www2.mazda.com/en/100th/
it changes fast enough to throw off the digital meter as well
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