IAT range

[Bruce Plecan]

      MAT Sensor
      Temperature vs Resistance (Approx)
      Deg. F Deg. C Ohms
      210 100 185
      160 70 450
      100 38 1,800
      70 20 3,400
      40 4 7,500
      20 -7 13,500
      0 -18 25,000
      -40 -40 100,700



This is pretty much universal in the gm word,
there is variant from time to time in sensors.
Like 25dC might be 3K, in a nother set might be 2.5...
Least in what I've measured
Grumpy
----- Original Message -----
From: "Swayze" <kswayze at bellsouth.net>
To: <gmecm at diy-efi.org>
Sent: Friday, June 02, 2000 12:45 PM
Subject: Re: IAT range


> the manual I had for the '77 analogue Caddy setup had a resistance chart
for
> the temp sensor in it. it is on incoming under '77cadman.zip. I am
wondering
> if the later digital stuff is the same?
> Swayze
> mswayze at truswood.com
> kswayze at bellsouth.net
> ----- Original Message -----
> From: "Bruce Plecan" <nacelp at bright.net>
> To: <gmecm at diy-efi.org>
> Sent: Friday, June 02, 2000 12:43 PM
> Subject: Re: IAT range
>
>
> >
> > > Here is my question: what is the common resistance range provided by
the
> > IAT
> > > sensor (GM)?
> >
> > ??, varies with temp.
> >
> > > I've heard that by replacing the IAT sensor with a 4,7kOhm resistance,
> the
> > > computer would think the air is at 0 degre Celcius.
> >
> > Nope thatz more like 60dF, 25K closer to 0dC.
> >
> > > Any input on this?
> >
> > There a numerous items that are temp sensitive removing them just fouls
up
> > the system.
> > Grumpy
> >
>
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