Fixed Histograms ( I hope )

**Cocor** · 11-02-2012

I think I fixed my histograms to give me the correct readings. lol.. We'll find out this weekend.

**BillBoost37** · 11-02-2012

Looking through your last week of posts.. this is pretty random and makes very little sense.

Wanna fill us in?

**Cocor** · 11-02-2012

When doing my LTFT tuning, I was getting -45% to -50% readings on the histograms but ~15% on the charts/gauges. I'd adjust my VE table accordingly from the histograms and it would make it so rich, it wouldn't start. I looked at the default VE-LTFT histogram configuration and it was reading from the Sensor-LTFT. Not sure if it was the correct default setting, but I changed it to the PID-LTFT Bank 1 SAE and started getting the same trim % from the charts. Would that be the correct reading I'm looking for, Bill?

**matt5112** · 11-02-2012

I wouldn't use fuel trims to adjust VE.

It puts you at the mercy of your NB, and your PCM's decisions as to what constitutes "lean" and "rich" which by the way, are entirely variable on certain conditions.

**Cocor** · 11-02-2012

Well, I don't have a WB yet. I'm just trying to get the hang of this from reading all these different threads on everyone's different methods on how to tune. lol. I just can't imagine those -50% readings were correct. Trial and error is were I'm heading.