305 TPI and 808 ECM - correction

Jackson, Trevor trevor.jackson at dsto.defence.gov.au
Thu May 6 00:05:28 GMT 1999


Oops, that should have been APYM3493 - I can't even read my own writing.

> -----Original Message-----
> From:	Jackson, Trevor 
> Sent:	Wednesday, May 05, 1999 6:35 PM
> To:	'diy_efi at efi332.eng.ohio-state.edu'
> Subject:	RE: 305 TPI and 808 ECM
> 
> Matt
> 
> When I get time in the next few days I'll make up a circuit to disable the
> VATS. What I need to know is what PROM code is the correct one to use -
> I've
> been unable to find any reference to the AGYM3493 EPROM that we currently
> have. If I can get hold of the right data then I should be able to burn a
> new EPROM to use. Do you know what the correct EPROM version is?
> 
> Trevor
> 
> 
> > -----Original Message-----
> > From:	Matt Tomlins [SMTP:Mattpw at ozemail.com.au]
> > Sent:	Wednesday, May 05, 1999 12:00 PM
> > To:	Jackson, Trevor; diy_efi at efi332.eng.ohio-state.edu
> > Subject:	Re: 305 TPI and 808 ECM
> > 
> > Trevor,
> > The 165 is the same as an 808 apart from having 1 extra chip to perform
> > high
> > speed serial communications.
> > The Camaro application is a Mass Air Flow system, whereas the Commodore
> is
> > MAP based. If you try to run the Camaro on the ASBX calibration, it will
> > run, but in limp home mode. You need to use a MAP sensor for it to run
> > properly. If you want to run the Camaro calibration, you will need to
> > disable the VATS. This can be done via an external circuit, or disabled
> in
> > the calibration (Much tidier solution). All of this informaion is in the
> > DIY_EFI archeives. Having said all that, I have run a mates Camaro on an
> > ASBX memcal. It ran quite well, but needed some modifications to the
> idle
> > control area.
> > 
> > If you need any more help, let me know
> > Cheers
> > Matt Tomlins
> > 
> > 
> > ----- Original Message -----
> > From: Jackson, Trevor <trevor.jackson at dsto.defence.gov.au>
> > To: <gmecm at efi332.eng.ohio-state.edu>;
> <diy_efi at efi332.eng.ohio-state.edu>
> > Sent: Tuesday, 4 May 1999 5:05
> > Subject: 305 TPI and 808 ECM
> > 
> > 
> > > I'm currently trying to help a friend get a 305 TPI engine running,
> but
> > > without much success so far. I believe that the engine is from an 87
> or
> > 88
> > > Camero auto (bought from a wrecked car), the wiring loom is from a
> > manual
> > > Camero, and the ECM we have is from the Australian Holden Commodore
> > (which
> > > from what I've read from the archives is the 1227808).
> > >
> > > I understand that the '808 ecm is more or less equivalent to the '165
> > ecm,
> > > and so we should be able to use it OK. The problem we have is with the
> > > Memcals. We have the Memcal that came with the ecm, which is a ASBX
> 9285
> > > from the 307 engine that is used in the Commodores, and a Memcal from
> > (we
> > > think) a 89 Camero with a 305 TPI (EPROM AGYM 3493).
> > >
> > > As yet we have been able to get the engine running using the 89 Camero
> > > Memcal, but it does run (not very well though) using the Memcal from
> the
> > > Commodore.
> > >
> > > We think that the Memcal from the 89 Camero is not working because we
> do
> > not
> > > have a VATS signal to send to the ecm - I plan to build the circuit to
> > > emulate that so that we can see if that is the problem. If this is the
> > > problem, is the program/data from the AGYM 3493 EPROM suitable for
> this
> > > engine, or do I need to get hold of a different EPROM image and
> program
> > up
> > > another EPROM?
> > >
> > > BTW, can anyone tell me what is the correct EPROM image for an 87/88
> 305
> > TPI
> > > engine?
> > >
> > > I've only just discovered these mailing lists and am slowly making my
> > way
> > > through the archives. There is a mountain of info there - I just need
> to
> > > find the relevant pieces.
> > >
> > > regards
> > >
> > > Trevor Jackson
> > >
> > >



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