Low fuel trim not updating
Jul 26, 2016, 01:07 PM
#1
Low fuel trim not updating
I was messing with my rom today and forced open loop by periphery and also changed the mid->low hz transition from 46 to 50 (low->mid= 57). When I switched back to closed loop I went for a drive and my mids updated but when I pulled into my driveway and waited for lows to update they never did.
Stft moves around, hz bounce from 25-36, load is under 40, raising hz above 57 makes the LTFT mid in use and dropping it back under 50hz it switches to 0% which is what the low LTFT reads. I unhooked the battery, reflashed stock rom and then back to the v7 I use, and also changed the mid->low hz back to the stock 46 and nothing. The only other thing I changed was MAF scaling but I've done that many times and has never caused this problem.
Edit: guess it just needed time to update as it did this morning. My stft at idle hover between -1/1 maybe that's why it took a bit longer.
Stft moves around, hz bounce from 25-36, load is under 40, raising hz above 57 makes the LTFT mid in use and dropping it back under 50hz it switches to 0% which is what the low LTFT reads. I unhooked the battery, reflashed stock rom and then back to the v7 I use, and also changed the mid->low hz back to the stock 46 and nothing. The only other thing I changed was MAF scaling but I've done that many times and has never caused this problem.
Edit: guess it just needed time to update as it did this morning. My stft at idle hover between -1/1 maybe that's why it took a bit longer.
Last edited by edsct9a; Jul 27, 2016 at 08:26 AM.
Jul 26, 2016, 01:29 PM
#2
EvoM Guru
iTrader: (1)
If STFT is active, its in closed loop. Are you sure you didn't accidentally turn off the lo ltft?
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