[racco]

I have been servicing and restoring ferrari's for twenty years and they all have them, even a riva ferrari boat that I rebuilt the ida's (eight in total) on two btm engines and they had them. You may have to drill a hole in the trottle plate of the carb with the lower draw reading or if the carbs are old and the throttle shafts are worn the venturi body may be worn and the air is bypassing the throttle plate. If the body is worn the carb may be srcap