i just cleaned the carbs a little bit, i saw that one of the gaskets between the carb and air box was missing and one was broken , so i am thinking that could be the problem, but then i hooked iup aa vaccum gauge and it showed 7lbs. on the first two carb and 13lbs on the 3rd and 4th carbs , how do i synchronize 1st and 2nd .... and 3rd and 4th together , becaus there is only 2 vaccum lines so 2 carbs share one..