Stft pulling -30 % at idle only help!!!!!!!

[MidwestMastersRacing]

I've gotten my tune pretty much dialed in but i cant seem to pull fuel from the map where these stft kick in. At WOT fuel trims are 0-3% +/-, but in park or gear when i let off the gas the cars pulling upwards of -30 % on the stft. Ltft disabled. Gen 3 5.3, ls6 intake and injectors, Btr stage 2 Truck cam, Full exhaust with mufflers, 93 oct, CAI. Should i be tuning these numbers in relation to the stft with my VE table? I've got it running pretty good besides this.box cruise 2.hplbox full throttle pulls.hplbox stock tune.hpt

[5FDP]

If the injector data is right and you don't have extremely high fuel pressure, you've likely done something partially wrong with your MAF and VE tuning.

You really need a wideband for this instead of just using fuel trims.

I bet if you pulled 3-5% from the MAF below 7,500hz and remove a little bit from the VE table in area's for idle and part throttle, the fuel trims would start to come back up toward zero.

[MidwestMastersRacing]

I ordered a wideband. Im running a walbro 255 with the corvette regulator. Ill gauge it to be sure. Thanks for the help ill try some tinkering.

[MidwestMastersRacing]

Got all my stft & ltft trims within 0-3% +/- at idle and part throttle.

[Ben Charles]

Anytime you add a can with more overlap it loses efficiently at idle so less fuel is needed vs the stock cam…