what is the correct level for fuel trims ?

[SB98UKexplorer]

im possibly narrowing this lean power condition to intake leak despite having 00m12 kit fitted, my intake runner looks a lil warped to the lower intake, what should my fuel trims data be saying if there was no leak for ST & LT?

 

[SB98UKexplorer]

update after taking readings

iv taken the readings of the fuel trims, how do they look?

 

[2000StreetRod]

OBDII Fuel Trims

According to the Ford 1998 Model Year OBD System Operation Summary: a lean malfunction is established when LTFT is > +25% and STFT is > +5%; a rich malfunction is established when LTFT is < -25% and STFT is < -10%.

I'm not familiar with your Delta Force's Recon application but I found a post on MustangForums that states that your unit may show trims from 0% to 100% with 50% meaning no correction. If that's correct then your LTFT1 of 41.02 may mean 50.00/41.02=1.21 (21%) and your STFT1 of 48.85 may mean 50.00/48.85=1.02 (2%). Or the LTFT1 could mean 50.00-41.01=8.92% but I'm just guessing. Do you have any DTCs? Do you have any documentation on your Delta Force Recon?