How many of you guys are tuning with Narrow bands on Idle and light cruising

[edcmat-l1]

If your airflow tables are dialed in +/- 5% there's no need for long term trims.

[Allen Vos]

Thanks for clarification guys. I'm going to turn LTFT off and likely leave them off and tune with STFT

Seems way easier and may explain why I was having trouble dialing things in.

Which is why I asked about using the wideband.

[Allen Vos]

I just turn LTFT off and keep them off. If you are ever "done" with tuning then turn them on. But the hard part of tuning, logging, revising the tune, driving, logging, etc is that you need to reset the LTFT learned values in the scanner before you drive and log each time (at least if you are making air/fuel changes). This is easy to forget and adds extra time and steps to the tuning process. And if you forget, then the potential for error starts to creep in your tune which will delay final results and have you going in circles.

The other argument is that the last LTFT value that is active will be carried forward into PE fueling. I have seen this happen on my E38. Which then throws off your attempts to calibrate PE air/fuel.

Just re-reading this post, this may seem like a dumb question, but if you turn LTFT off in VCM editor, you don't have to reset LTFT every time you flash, log and drive?

I'm assuming if you have LTFT's in your channels it will just have a value of "ZERO" when turned off?

[Cringer]

Just re-reading this post, this may seem like a dumb question, but if you turn LTFT off in VCM editor, you don't have to reset LTFT every time you flash, log and drive?

I'm assuming if you have LTFT's in your channels it will just have a value of "ZERO" when turned off?

Correct x2