7730 ARDC, AZTY, and other V6's

[Scott Feaver]

There is a ARUT9058 chip on the ftp site that you can tinker with if you
want..  Thats whats in my car.  its a 7730 ecm, 3.1V6 engine, Auto, 2.53
axle, with air.

Let me know if anyone takes a stab at it..

Thanks,
Scott

> -----Original Message-----
> From: owner-gmecm at esl.eng.ohio-state.edu
> [mailto:owner-gmecm at esl.eng.ohio-state.edu]On Behalf Of dhardin at ovec.com
> Sent: Wednesday, June 30, 1999 11:42 AM
> To: gmecm at efi332.eng.ohio-state.edu
> Subject: 7730 ARDC, AZTY, and other V6's
>
>
> I'm still working on it.  I definitely found the SA table.  That was easy,
> but to actually verify it was hard because I had to make sure
> what the code
> was doing and then verify that the code was calling that table.   The AZTY
> bin I disassembled and it looked much the same as my ARDC but with minor
> changes.  The code in the AZTY is slightly longer.  But from what I've got
> and from what you all have done with the AZTY we should about have it all.
> By the way the 727 hack on the ECMGUY page was very helpful.  The ARDC was
> arranged differently, but it was byte for byte in places which made it
> easy.  Some sections were obvious.  This lead me to what addresses where
> what variables in my chip.  Also I looked at the I/O addresses and assumed
> they would be the same and found those in my chip and look at what
> addresses they were stored to.  It seems the more I get dissassembled the
> easier it becomes like a puzzle.   I did find the min. temp for
> the EGR.  I
> will set this to $FF.  That is the best way to disable it, because it
> causes the calculations to work correctly.  Right now I just blocked the
> EGR tube  and the computer was happy (no light).  The address in mine was
> $8E8B = 66c = 154F,  if I am right.....  I am surprised that not many
> people realize what a performance and gas milage killer the EGR is.  There
> is no benefit of it that I can tell.
>      OK I just looked at the AZTY.  Look at address $4494 and following
> (which is actually $C494).  It looks like the coolant is address $4D (in
> mine its $4B) and that is compared to $8EEF.  That should be the min EGR
> temp.  Also AZTY is the same on the EGR bit which is $2B,#10.  I
> think that
> is the EGR on/off.  Look at this and see if I am right.  All or some of
> this could be wrong.  hehehe...............Anyway all of my notes are hand
> written on the printout.  maybe I could copy them later on and
> then scan or
> mail them to you all somehow....if I can be of help let me
> know................doug
>
>
>