2020 mustang gt fuel trims

[scott8241]

I have a 2020 gt with a JLT intake. I did not tune the car. I am wondering how the fuel trims look or if there are any other things that should be adjusted and the best way to fix them. It seems to me that the long term trims are off especially under load. I added a screen shot at idle and of a 5th gear pull.



mustang idle.png5th gear pull.png

[Thatwhite5.0]

STFT and LTFT are both bad, you need to tune the car for that intake. LTFT can only do some much, one bank is 40% lean which sounds about right. LTFT corrections can only correct fuel so much. Fuel trim swings will be wide.

[scott8241]

so, what the best way to go about fixing this?

[small tuner]

start by adding 30-40% to maf curve and fine tune from there

[scott8241]

thank you, I will try that later.

[Bill88stang]

Post tune the jlt intake maf transfer data has been posted a few times on here so you should be able to find it . Someone might offer to tweak it for you