how can you tune without knowing what your a/f is?
so yes, you need to have a wideband hooked up.
as for keeping it rich, i can't speak on tuning a 3, but generally you would rather have it rich up top and at wot.
so yes, you need to have a wideband hooked up.
as for keeping it rich, i can't speak on tuning a 3, but generally you would rather have it rich up top and at wot.