Yeah I'm not paying much attention to the O2 sensor as far as worrying about the tune.. more so how it's actually running and operating. I just don't think the spark plugs need to look that dark that new with only 12 or 15 miles on them? Also that really crappy running as I roll off of a heavy throttle softly just kind of wants to stumble its way down? And definitely a large hiccup if I jam it to the floor out of nowhere in a high gear.. I'm feeling I can tighten the secondary doors even more.. again my old carburetors grin best one step cleaner primary and secondary. That is 1250 CFM..
