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02-12-2016, 10:24 AM | #15 | |
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02-12-2016, 04:14 PM | #16 | |
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02-14-2016, 10:33 AM | #17 | |
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12-11-2018, 05:20 PM | #18 |
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I've been getting the same weird logging issues too:. 15.05 commanded AFR, OL, light to medium throttle. Actual measured AFR looks fine, car runs great, no CELs, no write failures. The only change I made to fueling is I made the CL load comp tables have offsets that make it match the POL table. It generally runs richer than the OTS CL map.
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12-12-2018, 03:15 AM | #19 |
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I followed 3 guys with OFT in the last year and all of them have that kind of offset in the logged command afr value
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12-12-2018, 03:54 AM | #20 |
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During closed loop the rear 02 sensor can influence the commanded afr value log AFCorrection #3
If af#3 corrections not disabled then you will see some offset in commanded afr by the rear 02 sensor. |
12-12-2018, 06:20 AM | #21 |
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I see the offset also with rear O2 Disabled
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12-12-2018, 10:12 AM | #22 |
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12-17-2018, 09:37 PM | #23 |
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So I logged almost everything I could find in OFT related to O2 and AFR for this and it looks like commanded AFR going to 15.05 under throttle correlates to something called a/f sensor voltage going below ~2V. There is no scaling matching this in the OFT defs I have; OFT has a front O2 sensor scaling in current, not volts.
https://datazap.me/u/protoformx/log-....96&tmax=15.06 I'll do more correlation analysis on this log in Octave after dinner. |
12-17-2018, 11:15 PM | #24 | |
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OK, here are some plots for: commanded AFR = 15.06 RPMs increasing Fuel system = OL https://imgur.com/a/Ym8HhIv First pic has the x-axes all sync'd are time in seconds. Second pic is just the bottom right 2 plots with the gaps taken out. X-axes are just samples, not time. Is there a measured AFR limit of ~13.5 for CL? |
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12-18-2018, 02:10 AM | #25 |
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Post the oft log to www.datazap.me will be esier to read
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12-18-2018, 03:16 AM | #26 | |
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12-18-2018, 03:56 PM | #27 |
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you commanded AFR is not logging correctly what calid is your tune ? are you using OFT V4 tunes ?
commanded afr may be being offset by the rear 02 sensor readings can you log AF#3 ? or alternative disable rear 02 sensor corre ctions by zeroing the two AF#3 correction tables the rest looks ok, but i think your problem is just logging is incorrect for your rom/tune http://www.ft86club.com/forums/showthread.php?p=2909412 |
12-18-2018, 04:22 PM | #28 | |
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I'm not sure I'm understanding your linked forum post, so let me see if I have it right. If the correct cal ID doesn't fix this, you're saying I can set the limits for my AF #3 sensor to 0/0, even if my RomRaider def puts it in a different group ("ALPHA AF 3 (Rear O2 Sensor)", not "Fueling - AF Correction/Learning") from what was shown in your screen cap? |
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