Front Bank STFT Maxed out Rich-Suggestions

[RealMcCoy]

I may have missed it, But as the concern is at idle, were the LTFT low, front and rear values posted?

[NOMIEZVR4]

OK, I increased the values in the MAF smoothing table and the trim has come down. Currently at 7% and the rear is at 2%. I will drive it some until they settle down completely, but I'm glad I've made progress. Thanks to everyone.

I'm a little confused though, the +12.5 indicated that the ECU was already adding fuel. Further increasing the numbers in the MAF table also ADDS fuel. What am I missing here? Shouldn't I have had to lower the numbers in the MAF Smoothing table?

also, the front o2 was cycling prior to me making any adjustments...

^^
You're confusing me... I need to get my head around all the acronyms.

[Greg E]

I'm a little confused though, the +12.5 indicated that the ECU was already adding fuel. Further increasing the numbers in the MAF table also ADDS fuel.

That's right. The trims are adding fuel to get to your 14.7 AFR happily cycling O2s. Adding to the MAF table does what the trims are already doing so the trims don't have to do it anymore.

Simple as that.

[Greg E]

STFT = short term fuel trim AKA O2 feedback
LTFT = Long term fuel trim (there are 3 types of these, low, mid, high)

[NOMIEZVR4]

Greg thank you for the clarification!