<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content=text/html;charset=iso-8859-1>
<META content="MSHTML 5.50.4522.1800" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face="Book Antiqua" size=2>Matt,</FONT></DIV>
<DIV><FONT face="Book Antiqua" size=2></FONT> </DIV>
<DIV><FONT face="Book Antiqua" size=2>If this thing was going into 24 degrees
retard from 6 BTDC, it'd stall. Are you 100% sure it's going 24 ATDC
?</FONT></DIV>
<DIV><FONT face="Book Antiqua" size=2></FONT> </DIV>
<DIV><FONT face="Book Antiqua" size=2>Lyndon.</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=msandine@purdue.edu href="mailto:msandine@purdue.edu">Matt
Sandine</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=gmecm@diy-efi.org
href="mailto:gmecm@diy-efi.org">gmecm@diy-efi.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, May 11, 2001 11:37 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> 870 Spark Control</DIV>
<DIV><BR></DIV>
<DIV><FONT color=#000000 size=2>The way I see it, the ESC, EST and ECM are the
only 3 things in this setup that can control advance/retard in this computer.
When I go through the normal routine of setting my timing at 6deg BTDC with
timing connector disconnected, that works out fine. Then, when I plug the
bypass back in, the timing RETARDS a good 24 degrees. I just replaced the ESC
module because I thought if it was bad, it could cause full retard but it
wasn't the case. I took all spark retard out of the chip and it still did the
same problem. Unplugged knock sensor-samne thing. Swapped ECM's and it still
happened. TDC has been verified many times with a piston stop. What
electronically could be causing the massive timing retard? The EST has also
been replaced and verified with a spare one. All wires have been rung. Oh,
boy. Thanks in advance, -Matt-</FONT></DIV></BLOCKQUOTE></BODY></HTML>