[Gmecm] More '730/$8D tuning questions...

[Clair Davis]

Mitch,
The trouble I'm having now is with code uploaded to the emulator, not burned
to a chip.  So far, I've burned 4 or 5 different chips, all roughly based on
the same .bin, and have had no problems.  In fact, if I switch .bins from
one of the AXXC or AXXD-based .bins back to one of my modified originals,
the running problem goes away.  This happens even when the car is running...
there's a small hiccup when I upload, then the engine smoothes right out.
Strange.  It's almost as if as Robin had surmised earlier that the AXXC and
AXXD might not be $8D bins.  I'm WAY out of my comfort zone thinking about
that kind of issue, though.

Clair


----- Original Message ----- 
From: "Terminal Crazy" <Terminal_Crazy at sand-hill.freeserve.co.uk>
To: <gmecm at diy-efi.org>
Sent: Tuesday, April 24, 2007 1:41 AM
Subject: Re: [Gmecm] More '730/$8D tuning questions...


> On 24 Apr, <rdanzy at suddenlink.net> wrote:
> > Have you tried using another eprom?  From my experience, I bought 2
> > eproms when I started programming a 89 TPI '165' ecm.  After about 5
> > turns on swapping eproms (save the old program, try a change) one eprom
> > would not control the engine properly (cooling fan turns on with
> > ignition, engine will not idle, backfires under acceleration, etc.) but
> > the other eprom with the same program runs great and has been through
> > about 100 burns or more to date.  Like you with the bad eprom, I cannot
> > get any codes other than 12.
>
> > Roger
>
> Clair, following Rogers reply, have you tried reading back what you have
> written to the ROM and compared the two.
>
> I'm not sure what type of __256 youre using but may require a
> different/thorough erasing procedure.
>
> If it's possible, have you checked they are fully erased.
>
> -- 
> Mitch - 1995 Z28 LT1 M6          terminal_crazy at sand-hill.freeserve.co.uk
> Lancashire England
http://www.sand-hill.freeserve.co.uk/terminal_crazy/
>
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