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FJR Motorcycle Forums
Technical & Mechanical Problems
Power Commander V w/Autotune Discussion
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<blockquote data-quote="ajpagosa" data-source="post: 1315053" data-attributes="member: 30139"><p>You know that is a really good idea! Thanks. I was going to start with the base PCV FJR map but I could just start with the zero map. See how it runs then turn on the AT200 with the canned AFR settings, but limited adjustment range.</p><p></p><p>My bike was one of the ones that needed a new ECU due to altitude issues. Absolutely unridable, dangerous after some elevation change. Would stall out randomly right when you needed to pass and just gt worse and worse until you stopped, shut it off, restart. I guess what happened was the algorithm for computing air density was not updating fast enough, and you'd get an accumulation of errors over time with large elevation changes to the point it was so far off it would not run. I've always wondered if that (new ECU) was part of the problem with the PCV and the AT200, since it is not the standard one so maps for it would be off.</p><p></p><p>Anyway the bike is not stock, it has K&N and two brothers exhaust. Those would tend to make it run lean but altitude somewhat pushes it the other direction (rich). So maybe starting with zero and seeing how that goes, then letting the AT200 work might be the right way to go. Will update when I get a chance. to do some basic maintenance and then try this idea out.</p></blockquote><p></p>
[QUOTE="ajpagosa, post: 1315053, member: 30139"] You know that is a really good idea! Thanks. I was going to start with the base PCV FJR map but I could just start with the zero map. See how it runs then turn on the AT200 with the canned AFR settings, but limited adjustment range. My bike was one of the ones that needed a new ECU due to altitude issues. Absolutely unridable, dangerous after some elevation change. Would stall out randomly right when you needed to pass and just gt worse and worse until you stopped, shut it off, restart. I guess what happened was the algorithm for computing air density was not updating fast enough, and you'd get an accumulation of errors over time with large elevation changes to the point it was so far off it would not run. I've always wondered if that (new ECU) was part of the problem with the PCV and the AT200, since it is not the standard one so maps for it would be off. Anyway the bike is not stock, it has K&N and two brothers exhaust. Those would tend to make it run lean but altitude somewhat pushes it the other direction (rich). So maybe starting with zero and seeing how that goes, then letting the AT200 work might be the right way to go. Will update when I get a chance. to do some basic maintenance and then try this idea out. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Power Commander V w/Autotune Discussion
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