Originally Posted by
tunaglove
Busy!! Have you noticed there's two "zones" of long term trims? On my display I can watch the trims change right before open loop. Or when cruising above 80mph. A slight decrease in fuel pressure may get you to perfect trims and a tune that sticks.
I've noticed the LTFT's changing at different times, so I just figured that different parts of the maps have different trims. In other words, at a certain pressure and rpm, the car may need -4%, while at a different area only -2%.