EFIDynoTuning Forum

Why would you target an error? The objective is a 0 error. If it removes fuel then you take that fuel out. If fuel trims are within' 3% positive then no need in adjusting it.

Maybe you misunderstood it.

I must have misunderstood something but I swear you said 1.03 was the target and it had something to do with if there was an error with the maf or something like that. I dont remember honestly. Is there a way I can disable adaptive fuel learning at idle? My HEGO cools down while idling and it skews the fuel trims at idle so the trims are not accurate. I have watched it happen while sitting idling for a few minutes and I would like to disable learning only below 1k RPM at low load values. If not, what is the maximum value I can place in the adaptive learning cells to minimize adaptive changes? I guess I should also ask, instead of disabling them should I point them at a different cell using a negative value like -33

That is how I understood it as well. I remember it as you never want the ecu to remove fuel only add it so shooting for the small positive correction will give you that. I know my fuel error isn’t consistent enough to go for 0 and not deal with negative corrections. My car seems to continue adding more fuel the longer it runs. My correction starts right around 1 once it’s up to temp, then as it gets warmer with a few coolant cycles it’ll get right to around 1.03, but then as it runs longer say like an hour it’ll creep up to 1.06. On a hot restart it’ll usually be around 1.10 but then will usually come back down after running for 10-15 mins. With no other tuning experience I have considered this my normal.

if the hego cools down and starts dumping fuel then adaptive on or off isnt going to change that

you need to disable closed loop after being at idle too long of thats whats happening. Set the NIOLD scalar to do just that.

127 is the max value for the adaptive update rate table fn1325

yeah any negative corrections I remove. Anything within 3% is normal and ideal. If its adding more than that but consistent based on temps and after warm startup then you need to adjust the ADAPTM scalar to have her wait longer before adapting and / or reduce the maximum ACT or ECT for adaptives to update so it stays consistent.

decipha wrote: ↑2021 May 01, 13:44 if the hego cools down and starts dumping fuel then adaptive on or off isnt going to change that

you need to disable closed loop after being at idle too long of thats whats happening. Set the NIOLD scalar to do just that.

127 is the max value

yeah any negative corrections I remove. Anything within 3% is normal and ideal. If its adding more than that but consistent based on temps and after warm startup then you need to adjust the ADAPTM scalar to have her wait longer before adapting and / or reduce the maximum ACT or ECT for adaptives to update so it stays consistent.

Good info.. Thanks