165 to late MAF

[Thomas Matthews]

Then either the hack is wrong, or it is a unused part of code, or the ECM
has its own Voltage to frequency converter.
Looked in my service manual for troubleshooting MAF on Chevy- 2.8's are
frequency, and you read those with a DVOM that reads freq, or a tachometer.
Bosch hot wire TPI MAF's are voltage output.
To further your testing if needed, I have a brand new Bosch 88-89 TPI MAF,
still in the box, with screens and fins still unmolested. Would be happy to
loan it out to you for the winter as it is a spare, as I won't be driving my
Bird this winter...
Tom
PS- Glad that you are home- how are you feeling?
----- Original Message -----
From: Bruce Plecan <nacelp at bright.net>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Saturday, November 27, 1999 8:34 PM
Subject: Re: 165 to late MAF


>
> Going by what I read in the ecmguy's HAC the 165 MAF is Frequency.
> Starting at 069A (ref BUA), we have the Ld var for scaling LV8 Scale
> Factors,
> and just before that we have MAF frquency 34-150 Hz, sounds like frquency
to
> me.
> Grumpy
>
> | Waaait a min, how are you getting around that the new GM MAF is
frequency,
> | and the old is voltage? Build a translator box for freq to volt?
> | At least with the Porsche 928 MAF it wouldn't need any translation...
> | Maybe one of the code wizards can rewrite the code so it can use a freq
> MAF?
> | I'm awaiting this as I want to start modifing my 89 and one of the first
> | things that I want to upgrade is the entire air inlet tract (Firebird).
> | Tom
> |
>
>