<!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<HTML>
<HEAD>
<META content=text/html;charset=iso-8859-1 http-equiv=Content-Type><!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
<META content='"MSHTML 4.71.1712.3"' name=GENERATOR>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT color=#000000 size=2>We hear horror stories all the time--some of the
shops that have the GM reflash equipment for performing upgrades
have</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT><FONT size=2>inadvertently let voltage
drop, or used a battery charger when doing a reflash--and have lost
communication part way through</FONT></DIV>
<DIV><FONT size=2>the deal--only fix I've heard of is a new PCM. Hope someone
else has better news...</FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Lyndon IPTECH</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">
<DIV><FONT face=Arial size=2><B>-----Original Message-----</B><BR><B>From:
</B>Beth Hempstead <<A
href="mailto:dave_hempstead@hp.com">dave_hempstead@hp.com</A>><BR><B>To:
</B>gmecm <<A
href="mailto:gmecm@efi332.eng.ohio-state.edu">gmecm@efi332.eng.ohio-state.edu</A>>;
diy_efi <<A
href="mailto:diy_efi@efi332.eng.ohio-state.edu">diy_efi@efi332.eng.ohio-state.edu</A>>;
Dave <<A
href="mailto:dave_hempstead@hp.com">dave_hempstead@hp.com</A>><BR><B>Date:
</B>July 6, 1999 7:05 PM<BR><B>Subject: </B>HELP, I erased the flash in my
PCM<BR><BR></DIV></FONT>
<DIV><FONT color=#000000 size=2>Please help me!!!</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT color=#000000 size=2>I wrote alot of complex code (with at least
1 bug in it) which successfully erased the flash in my '94 GM PCM, but did
not successfully re-program it with new bits. Therefore, I have a PCM
which is dead. </FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT color=#000000 size=2>I realize that I can unsolder the flash,
reprogram them, and solder (or socket) them back in the PCM.
</FONT></DIV>
<DIV><FONT color=#000000 size=2></FONT> </DIV>
<DIV><FONT size=2>Is there any easier way to get the PCM back to listening
to the ALDL???? I can easily open it up. </FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>What do you experts do when they try to reflash a PCM, and
you get a glitch, power failure, or some other error code. I doubt
that you throw it away. How do you recover the PCM???</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Any help will be GREATLY appreciated</FONT></DIV>
<DIV><FONT size=2>Dave (boy do I feel stupid) Hempstead</FONT></DIV>
<DIV><FONT size=2>(formerly) '94 Caprice PCM
16188051</FONT></DIV></BLOCKQUOTE></BODY></HTML>