mazdizzle
+1y
My mazda won't pass emissions because it's running too rich. I was wondering which way to turn the a/f screw on the pass side of the carb to make it run leaner. Assuming that's the a/f adjustment screw. I did a search but came up empty. I replaced the cat last year when I was having trouble with emissions but I guess since it runs rich it could have ruined it. Thanks for any help in advance.