Originally Posted by tmaung
Why are you running Stage 3 without supporting mods?
If you understand what the term supporting mods are then you would understand that for a pull or two the car is still happy on those maps.
The only thing that will happen is the car will be inconsistent between consecutive pulls due to higher IAT's, it should have nothing to do with fuel trims maxing out.
Stage 2 maps max my fuel trims as well. The JB4 I had was maxing fuel trims on map 5 with 30% E85. Others can run 50% E85 and not max the trims, so on multiple tunes my car is consistently maxing fuel trims well before others do.
I have an unlucky DME that seems to not have a the average fuel trim ceiling.