Fitech running fat

I ain't no expert but.........

Some big cam engines have problems with a MAP sensor. Google up alpha-N. Is the FItech capable of that? I did not look it up. On Holley, you can operate Alpha-N at lower RPM where the cam is giving the MAP problems, and switch to "density" under better vacuum conditions.

Also it might be just as simple as an in-accurate O2 sensor, or as said above, a bad choice of mounting