2002 Mustang GT, 4.6L engine. My long term fuel trim is showing 14.1% on bank 1 and 12.5% on bank 2. I tried cleaning the MAF sensor and pouring a can of seafoam into the gas tank and used seafoam in the intake but that didn't help. Time for new fuel injectors? I know that these fuel trim readings aren't catastrophic yet.
Well realize when they add that much fuel they're running lean many things can make them run lean from leaking and take manifold gaskets low fuel pressure dirty fuel injectors bad math sensor cleaning does nice fix them can be a lot of things
I went to look at this today and found the LTFT for bank 1 to be 6.3 and bank 2 was 3.9. While driving around the FT jumped closer to 10% on bank 1 and at the end of the live data it dropped 2 percentage points. I don't see any obvious issues. I'd like to get it closer to 0% but I don't know how much effort that'll entail. I recorded the MAF flow rate also and varied between 0.5 lb/min at idle to 7.8 at 30 MPH. I guess I'll spend a little more time on this.