Fuel Trims/Learning will not disable

[joecar]

i.e. I'm saying you have to set those cells to Lambda 0.99 or 1.01 to avoid SOL/STFT.

[Meister]

All those lambda 1.00 cells will trim using STFT.

This is a commanded AFR table. I am wanting it at 1 right now while tuning and with all STFT and LTFT off it should not correct. My VE should be adjusted to get it to 1

[joecar]

That is what I am saying... the COS will trim on B3647 cells that are 1.00.

If the COS hits a cell in B3647 that is 1.00, the COS will trim to 1.00 using STFT.

This is a feature of the COS's.

[joecar]

If you set it to command 0.99 lambda, and your wideband measures 0.99 lambda, the BEN will be 1.00 and VE is good.

i.e. you should be adjusting the VE to make BEN converge on 1.00 regardless of what is being commanded.

[joecar]

If you notice, the COS does not have B4206 (enable/disable STFT on 1.00 cells in OL table)...

the OL table cell value being 1.00 enables STFT trimming on it.

[Meister]

Ok, so if I set this to .99 or something else other than 1.0 it will disable trimming?

[joecar]

Ok, so if I set this to .99 or something else other than 1.0 it will disable trimming?

Yes, that is correct.

[Meister]

Interesting and exactly what I want. Trim off idle and cruise, no trims at idle and wot. Fantastic

Now, if I could only figure out why when I first start the car the maf is not failed (CEL is OFF), it runs poorly for a few seconds until CEL kicks on (indicating maf is failed)....the maf wire is removed from the harness

[joecar]

Does C6001 have the MAF DTC's set to 1-Trip...?

[Meister]

Does C6001 have the MAF DTC's set to 1-Trip...?

Yes these were set properly along with 101, 102, and 103 to tell me the MAF has been failed (which I turn off to deliver the car).....9 out of 10 times it happens where the CEL would not come on, it would run poorly and then once the CEL comes on it would be perfect. That 1 time, which I cannot attribute to any condition, it is perfect