otis44 pretty much covered everything. Only thing I want to add is that if you find that vacuum line is bad at an end/connection point don't just cut off an inch and think you are good to go. I did that and a month later problem re-occurred. Reason vacuum lines break/go bad is at this point in time they are old and dryed out so the whole line should just be replaced which is what I ended up doing. Pretty cheep repair : think the line was like 75 cents a foot. Also if I recall it should be high pressure line. Do hope this helps further.