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<TITLE>RE: WOT open loop/closed loop</TITLE>
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<P><FONT SIZE=2>Ron,</FONT>
<BR><FONT SIZE=2>My logic in WOT (power enrichment) mode being open loop is so the substitute PCM values (12.5:1 -13.1:1 AFR ) are used instead of the O2 sensors (14.7:1 switching.) That's just how I justified it to myself. </FONT></P>
<P><FONT SIZE=2>The pcm still keeps the closed loop flag, but sets the "learn disabled" flag, meaning the current events are not changing long term fuel trimming. I believe the closed loop flag is still enabled, so the enrichment prior to going WOT is retained when at WOT. (Better to be slightly rich before WOT basically, to avoid further enrichment during WOT)</FONT></P>
<P><FONT SIZE=2>I used open loop (non-O2 correcting) for my idle rpm's when things got really rough. When I finally got the exhaust to quit leaking, and fixed all the voltage drops on my wires I was able to go back to closed loop idle again.</FONT></P>
<P><FONT SIZE=2>Hope this makes sense,</FONT>
<BR><FONT SIZE=2>-Christian</FONT>
<BR><FONT SIZE=2> </FONT>
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<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: Ron Schroeder [<A HREF="mailto:rjs@bnl.gov">mailto:rjs@bnl.gov</A>] </FONT>
<BR><FONT SIZE=2>Sent: Monday, September 24, 2001 9:37 AM</FONT>
<BR><FONT SIZE=2>To: gmecm@diy-efi.org</FONT>
<BR><FONT SIZE=2>Subject: WOT open loop/closed loop</FONT>
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<P><FONT SIZE=2>Hi,</FONT>
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<P><FONT SIZE=2>Why is WOT open loop? Wouldn't it be better to be closed loop or is feedback response an issue?</FONT>
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<P><FONT SIZE=2>Ron Schroeder</FONT>
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