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Gloonge · 12-17-2020, 07:32 AM

Back again guys.

Been on my final tune for my SC for a few months everything running smooth. Decided to hook up my oft to data log the other day and noticed that my fuel trims are doing some strange things.

At idle everything is nominal and of course at higher throttle range they go into closed loop, no issues there. But starting at about 10% throttle (before boost) and all the way until open loop my LTFTs run to around - 15% and STFTs run up to +15%. Everything bounces back to normal when I drop back down to idle. Afr and command afr are within a few tenths of each other at all times.

Never seen anything like this, is it a software issue a reflash will fix or anyone know where I should start looking?

There are no running issues, just this data point.

12-17-2020, 07:32 AM	#1
Gloonge Senior Member Join Date: May 2016 Drives: 2013 frs raven Location: W.P.B - Florida Posts: 224 Thanks: 5 Thanked 53 Times in 39 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	More fuel trim questions. Back again guys. Been on my final tune for my SC for a few months everything running smooth. Decided to hook up my oft to data log the other day and noticed that my fuel trims are doing some strange things. At idle everything is nominal and of course at higher throttle range they go into closed loop, no issues there. But starting at about 10% throttle (before boost) and all the way until open loop my LTFTs run to around - 15% and STFTs run up to +15%. Everything bounces back to normal when I drop back down to idle. Afr and command afr are within a few tenths of each other at all times. Never seen anything like this, is it a software issue a reflash will fix or anyone know where I should start looking? There are no running issues, just this data point.