Well the vacuum leak IS a problem that needs to be fixed before anything more can be done. One at a time-I hate the "shotgun" method of trouble shooting.
occasionally the "shotgun method" is the best option, sometimes it isnt one thing thats the problem, it's a combination of small things, each one not enough to cause severe drive ability issues, but when combined together they can wreak havoc with your ability to find "the problem"
