ECMlink fuel trim

[dsmvenge]

So if your under boost and your feul trims are 0 why would my wide band read in the 12.4 area at like 16lbs of boost

 

[cherrymane]

Good question

 

[lil corb]

So if your under boost and your feul trims are 0 why would my wide band read in the 12.4 area at like 16lbs of boost

Fuel trims are a closed loop thing (non wot situations) where the o2 sensor is trying to stay at 14.7 and how ever far away you are 0 equates to how rich or poor you are and how much adjustment is needed to get back to 14.7. When you are under boost you enter open loop (tuning from ecu), it doesn't read any fuel trims from the o2 sensor.