On Wed, 2003-04-16 at 11:18, Herbert Graf wrote:
> Does GM publish the pulse width vs. gas injected curves?
> Anybody ever see these curves. Maybe the ECM gets a different signal where I
> could determine gas used? (the mass airflow sensor, is there a relation
> there I'm missing?).
>
> Thanks for any insight. TTYL

You may have better luck on the GMECM mailing list, which is available
at www.diy-efi.org.  Your first step would be to find out which ECM you
have, and from there you can find out what sensors you have.

The MAF alone would not work because fuel used is airflow and rpm (load)
dependent.

Something that measured Inj PW and used the VSS (vehicle speed sensor)
would be my choice, although that wouldn't work when the car isn't
moving.  Tapping into the distributor reference pulse would be much more
difficult though.

--
Alex Harford                    "Crikey!  He bit me!"
http://www.alexharford.com      -- The Crocodile Hunter
alex-spam@alexharford.com       Tel: (604) 221-1468

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