PE commanded AFR leaning out at WOT??
09-18-2010, 02:18 PM
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PE commanded AFR leaning out at WOT?? I've been tuning my friend's turbo 4.8 2010 Silverado and I've come across something weird that I can't figure out. Sometimes while in PE the commanded AFR will go from the 11.29 that I'm commanding via the PE EQ table to a 12.24. It happens at frame 15,500 in the attached log. If you look at the PE EQ ratio table you'll see that I command a 1.3(11.29) almost all the way across so I have no idea why the commanded leans out to a 12.24. I'm thinking it must be time related because it only seems to do it on longer runs. Right now I have the AFR spark table set to start taking timing out a 11.7 so that when it goes lean it doesn't see knock but I want to correct this so I can up the timing again without having to worry about it.
EDIT: Apparently both files are too big.
EDIT: Apparently both files are too big.
09-18-2010, 04:40 PM
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It is a flexfuel engine, but it's set to disabled under engine/fuel control/general. I'm sure it's a modifier of some kind but I've changed lots of stuff already and I can't figure it out.
09-18-2010, 04:58 PM
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09-18-2010, 04:59 PM
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So I cut down the log into a .csv but apparently you can't upload those here. If anyone wants to see the log or tune just PM me and I'll send them to you.
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09-19-2010, 04:46 PM
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09-19-2010, 04:55 PM
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STFT and LTFT are not disabled. They were both zero during the WOT run in the screen cap attached below. Here's in the base PE EQ Ratio vs RPM table as well as a screen shot of it happening.
09-19-2010, 05:42 PM
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Sorry, it's too big to be attached here since it's 2.3MB and there is a 1.24MB limit here.
http://www.filedropper.com/coreysilverado9-15-10scaled
http://www.filedropper.com/coreysilverado9-15-10scaled
09-20-2010, 05:45 PM
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09-20-2010, 05:47 PM
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