How about going to a local gas station and having the AFR checked against their computer (Sun?) diagnostic AFR checker?
I went from 75 jets to 68 based on "smell" and "burning eyes". The car was reported to have run 11.9? WITH the 75's and I ran 11.904 with the 68's. Therefore, I guess I "done good". It "smells" way better at least.
...... helluva way to dial in your jet size though.
