As far as I know the wiper is attached to a flap just past the air cleaner.
I wish there was a Miata service manual that explained the theory.
Gus in Denver

> On 2015m11d 05, at 14:38 MST, John Ferrell <jferrell13@triad.rr.com> wrot=
e:
>=20
> Just a guess:
> The AFM controlling variable is determined by the shape of the airvane=20
> and its mass.  The thermistor provides a delay into the equation and=20
> assures a detectable hysteresis in the output solution.
> The programmer was provided the measurements received in the output that=
=20
> resulted with the varying inputs with the delay built in to keep it from=
=20
> oscillating.
> Mostly If statements if memory was dear, tables if brute force was=20
> desired. I thought the designers were moving away from MAF and dummy=20
> that parameter from RPM. At least there are sane ways to measure RPM.
> The longer I write, the dumber my answer looks.... I will send it anyway.=
...
>=20
> On 11/5/2015 3:14 PM, 99guspuppet wrote:
>> I mentioned that I opened up my AFM.
>> I expected the wiper on the AFM potentiometer to
>> track the engine RPM as I assumed RPM and airflow were
>> linked proportionally.
>> Instead I saw the wiper move up with increasing RPM,
>> then drop back.  Since the RPM was hard to control
>> ( the reason why I am looking at engine parts ) I was unable
>> to make a reliable observation of exactly what happened.
>> Any comments ?
>>=20
>> Gus in Denver
>=20
> --=20
> John Ferrell W8CCW
>    Julian NC 27283
>  It is better to walk alone,
> than with a crowd going the wrong direction.
>                   --Diane Grant
>=20
>=20


--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.