GM 2732 won't program

[TK]

I've had no problems with original V6 Fiero chips. Let me look at the
manufacturer. I wonder what's happening.

Terry

----- Original Message -----
From: Programmer <nwester at eidnet.org>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Saturday, October 16, 1999 6:00 PM
Subject: Re: GM 2732 won't program


> Yep--shuffle between 27C32B and 27C32 by differing manufacturers seems to
> solve it. Verifies "erased" just fine, but won't program passed the first
> byte--or second (can't remember how far it gets). If I don't get further
> results, they get turfed.
>
> I've had absolutely no luck with the chips in a Fiero--they've got a
raised
> section on the chip with a window. I've also found a few of these in some
> older cars...and they just don't talk to me.
>
> Lyndon.
> -----Original Message-----
> From: Ludis Langens <ludis at cruzers.com>
> To: gmecm <gmecm at efi332.eng.ohio-state.edu>
> Date: October 16, 1999 2:50 AM
> Subject: GM 2732 won't program
>
>
> >Has anyone had problems programming GM 2732 EPROMs?  I tried to make
> >some minor changes to the EPROM of a 1992 305 TBI.  The EPROM erased
> >fine, but my programmer can't write to it.  After several tries, one
> >byte programmed:  The byte that should have gone to 0x000 ended up at
> >0x800.  I ended up using a 2732A that I had lying around.
> >
> >I tried programming voltages of both 21 and 25 volts.  Might the chip in
> >question need 12.5?  My programmer doesn't support reading out the chip
> >manufacturer code.  So I can't check the exact programming needed by
> >this chip.  This GM EPROM probably was made by NatSemi.
> >
> >Incidentally, I have an old 2732B that I've never been able to program
> >either.
> >
> >--
> >Ludis Langens                               ludis (at) cruzers (dot) com
> >Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
> >
>
>