I'm trying to set the A/F ratio on my 71 Stag with Weber carb. My target is 13 using an AFR sensor in the exhaust. I can achieve the target with 1 row of cylinders but I can't get the other row any leaner than 10.5 before the adjustment screw bottoms out.
Does anybody have any idea what would cause this?
I would think that any dirt in the carb or blocked jets would cause the opposite problem.
Many thanks for any advice.