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<DIV> </DIV>
<DIV><FONT size=2>In this situation, wouldn't an EGT be a better choice for
tuning?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Nope, plug cuts.</FONT></DIV>
<DIV><FONT size=2>Just disable codes 13-44-45, disconnect the O2 sensor, and
set the C/L enable temp to 255.</FONT></DIV>
<DIV><FONT size=2>You now have a fully open open loop chip, and no cycling of
rich lean.</FONT></DIV>
<DIV><FONT size=2>Off road use only....</FONT></DIV>
<DIV><FONT size=2>Never totally rely on any one indictor of mixture, unless
your using a WB and are sure of it.</FONT></DIV>
<DIV><FONT size=2>Even plugs can fool ya.</FONT></DIV>
<DIV><FONT size=2>Grumpy</FONT></DIV>
<DIV><FONT size=2> What truck was non-feedback?. Some had
open loop idle, but I haven't seen a non O2 equipped 747.... Some 749s
were thou.</FONT></DIV>
<DIV><FONT size=2>Grumpy?</FONT></DIV>
<DIV><FONT size=2>Terry</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A href="mailto:kereyn@gte.net" title=kereyn@gte.net>Kevin Reynolds</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
href="mailto:gmecm@efi332.eng.ohio-state.edu"
title=gmecm@efi332.eng.ohio-state.edu>gmecm@efi332.eng.ohio-state.edu</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, December 09, 1999 8:52
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> 747 programing</DIV>
<DIV><BR></DIV>
<DIV><FONT size=2>I'm just mentally mapping out the process I'll be
using to get the right prom setup for
my crossfire.</FONT></DIV>
<DIV><FONT size=2>Some trucks using the 747 were non feed back. I have both
a vacuum gauge and Air/Fuel ratio gauge in the dash.</FONT></DIV>
<DIV><FONT size=2>Tuning would seem to be a lot easier if the O2 didn't keep
swinging due to feedback adjustment. How does the non feed back setup
differ from the rest? Can I just get a prom from a non feed back vehicle,
tweak the settings where I want, and then burn those numbers into a feed
back style prom? What am I missing? It just seems that for idle and
steady state cruise conditions it would be easier to narrow down your
numbers and get them right this way and then turn the feed back on to
compensate for altitude/temp etc.
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